I am havng problems with the new iTunes 11.0?

Okay so I just updated my iTunes, and the entire layout sucks now and it can't be used properly. I just bought two albums off of the iTuens store, both are Thrash Metal albums. The album itself though is classified as Alternative. I want to edit each individual file and change the Genre to "Thrash Metal". The first half of the album worked fine, but these last few songs won't change. I will delete "Alternative" and then manually type in "Thrash Metal" then hit enter, I have also tried clicking "Ok". Then when I go back into the file it says Alternative again, is anyone else experiencing this problem? If so, how should I fix it?

WARNING: If you get on iTunes and are asked to update, don't do it. This new iTunes sucks and though it isn't convoluted for someone with half of a brain, it certainly isn't as basic and simple as the iTunes before the update.