Ok. I understand.
You should make sure the albums that are showing the wrong art actually have art in iTunes on the the computer.
I't has been a while since I've used Home Sharing. I often got blank art, which tended to fix itself after a while, but I don't remember ever getting the wrong art.
Also, Home Sharing is heavily dependent on your wi-fi having a good signal (on both computer and iPad) and the computer being responsive. Try with the iPad closer to the router and the computer idle except for iTunes and see if that helps.
Other than that, I have no ideas for fixing this problem. Not that this is a solution, but a possible explanation, maybe.