Painting tape is pulling off the paint on the wall too. Why? Was the paint too thick?

Hmm, I've always been under the impression you pull the tape before it dries, specifically so that doesn't happen... That's what I've always done, and talking to painters at home depot (I work there) that's been the general consensus. Not sure what letting it dry first would accomplish, it's only there to prevent the paint from getting on trim and whatnot, once it's painted, why leave it there?