I have noticed that many games have wrong plattforms incons on the main page and specially in the "Recommended for you" section in "my promo status" page.

This will give you an idea:
https://www.gog.com/upload/temp/18a1529abc066fe5de1788c650fe0c1ba7960a2f.png

All games but Forced are wrong.
The swappers has a Tux (Linux) icon while it has no Linux version here on GOG (it should as it has Linux on Steam, but that's other thing).
Evoland and 1979 Revolution, both appear with a Tux icon and none of them has Linux versions yet on GOG.
Braid, Oddworld: New 'n' Tasty, Clarc and TIS-100 are in the opposite case, all of them have Linux versions available but none of them shows the corresponding icon.

I hope the bug gets fixed because this can make people buy games thinking there's a Linux or a Mac version while there isn't or people who would buy the game not doing it because they don't see the game advertised for their platform.

I noticed this couple days ago, all the game have my wishlist status on them, but hovering over them the link to the game doesn't match the picture.

While this could be annoying, it's kinda minimal since I am only on that screen for... 30 seconds maybe, I check in, I redeem any games I qualify for, and that's about it.