Yesterday I noticed there are many Polish channels with mixed-up and combined EPG.
Here are the couples I have found:
TV4 & TVP Sport
TVN24 (SD/HD) & TVP Historia
TVN Style (SD/HD) & Polsat Sport News
National Geographic (SD/HD) & Polsat 2
CBS Reality & 4Fun TV
NatGeo Wild (SD/HD) & Superstacja
TVN CNBC & Polo TV
Eska TV & TVN Meteo
Religia TV & Discovery Historia
Polonia 1 & Edusat
Please note Edusat channel left satellite some time ago. It is only an internet TV service, I think.
Also, I am not sure if CBS Drama EPG is correct.
I think there must be some changes on the website you are using or maybe there is an error in rytec.channels.xml.
If you need channel references, do let me know, please.