You did it! I've used those two only just to test and it automatically discovered all others and scanned them successfully. And now mystery is solved, as those channels are DVB-C channels. I had no idea that both standards are emitted at the same time on the same cable, but it explains everything. Thank you!
[HGTV HD]
SERVICE_ID = 4305
NETWORK_ID = 1
TRANSPORT_ID = 1
VIDEO_PID = 1098
AUDIO_PID = 1099 1100
PID_06 = 1101
FREQUENCY = 666000000
MODULATION = QAM/256
INVERSION = AUTO
SYMBOL_RATE = 6900000
INNER_FEC = AUTO
DELIVERY_SYSTEM = DVBC/ANNEX_A
Display More
dvbv5-scan initdata
Scanning frequency #1 506000000
Lock (0x1f) C/N= 36.75dB UCB= 12 postBER= 17.5x10^-3
Service atm ROZRYWKA, provider Service provider: digital television
Service TVP KATOWICE, provider Service provider: digital television
Service TV Republika, provider Service provider: digital television
Service TVP Polonia, provider Service provider: digital television
Service TVP Kultura, provider Service provider: digital television
Service TVP Historia, provider Service provider: digital television
Service TV TRWAM, provider Service provider: digital television
Service FOKUS TV, provider Service provider: digital television
Service 4FUN.TV, provider Service provider: digital television
Service NATIONAL GEOGRAPHIC HD, provider Service provider: digital television
Service TVP Info HD, provider Service provider: digital television
New transponder/channel found: #3: 522000000
New transponder/channel found: #4: 530000000
New transponder/channel found: #5: 538000000
New transponder/channel found: #6: 546000000
New transponder/channel found: #7: 554000000
New transponder/channel found: #8: 562000000
New transponder/channel found: #9: 570000000
New transponder/channel found: #10: 578000000
New transponder/channel found: #11: 586000000
New transponder/channel found: #12: 594000000
New transponder/channel found: #13: 602000000
New transponder/channel found: #14: 610000000
New transponder/channel found: #15: 618000000
New transponder/channel found: #16: 626000000
New transponder/channel found: #17: 634000000
New transponder/channel found: #18: 642000000
New transponder/channel found: #19: 650000000
New transponder/channel found: #20: 658000000
New transponder/channel found: #21: 666000000
New transponder/channel found: #22: 674000000
Scanning frequency #2 514000000
Lock (0x1f) Signal= -53.00dBm C/N= 37.25dB UCB= 12 postBER= 1.00
Service Disney channel HD, provider Service provider: digital television
Service Polsat HD, provider Service provider: digital television
Service Polsat 2 HD, provider Service provider: digital television
Service Polsat Seriale, provider Service provider: digital television
Service Polsat News HD, provider Service provider: digital television
Service Polsat Doku HD, provider Service provider: digital television
Scanning frequency #3 522000000
Lock (0x1f) Signal= -52.00dBm C/N= 36.75dB UCB= 12 postBER= 111x10^-3
Service Polsat Film HD, provider Service provider: digital television
Service TV 4 HD, provider Service provider: digital television
Service EUROSPORT 1 HD, provider Service provider: digital television
Service TV PULS HD, provider Service provider: digital television
Service VOX MUSIC TV, provider Service provider: digital television
Service MTV Music Polska, provider Service provider: digital television
Service ESKA TV, provider Service provider: digital television
Scanning frequency #4 530000000
Lock (0x1f) Signal= -52.00dBm C/N= 37.00dB UCB= 12 postBER= 1.00
Service TVN 24 HD, provider Service provider: digital television
Service Tv Okazje, provider Service provider: digital television
Service TVN Turbo HD, provider Service provider: digital television
Service TVN 24 BIS HD, provider Service provider: digital television
Service Polsat News 2, provider Service provider: digital television
Service AXN White, provider Service provider: digital television
Service 4FUN FIT AND DANCE, provider Service provider: digital television
Scanning frequency #5 538000000
Lock (0x1f) Signal= -51.00dBm C/N= 37.00dB UCB= 12 postBER= 1.00
Service Kino TV, provider Service provider: digital television
Service EUROSPORT 2 HD, provider Service provider: digital television
Service TVN HD, provider Service provider: digital television
Service FOX HD, provider Service provider: digital television
Service History Europe, provider Service provider: digital television
Scanning frequency #6 546000000
Lock (0x1f) Signal= -52.00dBm C/N= 37.50dB UCB= 12 postBER= 1.00
Service TELE 5 HD, provider Service provider: digital television
Service TLC HD, provider Service provider: digital television
Service Travel Channel HD, provider Service provider: digital television
Service TV6 HD, provider Service provider: digital television
Service Super Polsat HD, provider Service provider: digital television
Scanning frequency #7 554000000
Lock (0x1f) Signal= -53.00dBm C/N= 36.25dB UCB= 12 postBER= 1.00
Service TVP Rozrywka, provider Service provider: digital television
Service Discovery Channel HD, provider Service provider: digital television
Service Animal Planet HD , provider Service provider: digital television
Service Da Vinci Learning, provider Service provider: digital television
Service AXN, provider Service provider: digital television
Service 4FUN HITS, provider Service provider: digital television
Service Polsat Viasat History HD, provider Service provider: digital television
Service AMC HD, provider Service provider: digital television
Scanning frequency #8 562000000
Lock (0x1f) Signal= -53.00dBm C/N= 36.75dB UCB= 12 postBER= 1.00
Service Disney junior, provider Service provider: digital television
Service TVP HD, provider Service provider: digital television
Service TTV, provider Service provider: digital television
Service POLONIA 1, provider Service provider: digital television
Service BBC HD, provider Service provider: digital television
Service DOMO+ HD, provider Service provider: digital television
Scanning frequency #9 570000000
Lock (0x1f) Signal= -53.00dBm C/N= 37.00dB UCB= 12 postBER= 1.00
Service Polsat Sport News HD, provider Service provider: digital television
Service AXN Black, provider Service provider: digital television
Scanning frequency #10 578000000
Lock (0x1f) Signal= -53.00dBm C/N= 36.25dB UCB= 12 postBER= 1.00
Service Polsat Food HD, provider Service provider: digital television
Service RT DOC HD, provider Service provider: digital television
Service TVP 1 HD, provider Service provider: digital television
Service TVP 2 HD, provider Service provider: digital television
Scanning frequency #11 586000000
Lock (0x1f) Signal= -53.00dBm C/N= 36.75dB UCB= 12 postBER= 1.00
Service Discovery ID Poland, provider Service provider: digital television
Service CANAL+ HD, provider Service provider: digital television
Service CANAL+ SPORT HD, provider Service provider: digital television
Service CANAL+ 1 HD, provider Service provider: digital television
Scanning frequency #12 594000000
Lock (0x1f) Signal= -52.00dBm C/N= 37.25dB UCB= 12 postBER= 1.00
Service CANAL+ FAMILY HD, provider Service provider: digital television
Service CANAL+ FILM HD, provider Service provider: digital television
Service POLO TV, provider Service provider: digital television
Service Superstacja, provider Service provider: digital television
Service Filmbox Action, provider Service provider: digital television
Service Planete+ HD, provider Service provider: digital television
Scanning frequency #13 602000000
(...)
Scanning frequency #21 666000000
Lock (0x1f) Signal= -52.00dBm C/N= 37.00dB UCB= 12 postBER= 1.00
Service Polsat Music HD, provider Service provider: digital television
Service Metro TV, provider Service provider: digital television
Service HGTV HD, provider Service provider: digital television
Service Stars.TV, provider Service provider: digital television
Service TVT, provider Service provider: digital television
Service FRANCE 24 HD FR, provider Service provider: digital television
Service TV 5 Monde HD, provider Service provider: digital television
Scanning frequency #22 674000000
Lock (0x1f) Signal= -51.00dBm C/N= 37.00dB UCB= 12 postBER= 1.00
Service Viasat Explorer, provider Service provider: digital television
Service Viasat Nature, provider Service provider: digital television
Service Epic Drama, provider Service provider: digital television
Service TVP Document, provider Service provider: digital television
Service DW Germany, provider Service provider: digital television
Service Crime Investigation, provider Service provider: digital television
Service EX Sport, provider Service provider: digital television
Service Red Carpet, provider Service provider: digital television