I am trying to paint my laundry room and the drywall is peeling off when I used a roller or a hand held pad. I have never experienced this so I need help. My house is 24 years old.

Should I paint the walls before or after carpeting is removed and new flooring installed?

I keep painting the bedroom walls and spots keep appearing after it dries. They are not patched areas but appear damp spots? How do I prevent this?

I work at a 2 year old hotel and in one office there are round pink spots that have formed on the wallpaper. I peeled back the areas in question and the drywall is fine with no spots on it. What is happening?

Painting bedroom trim off white. Do I paint the closet door and bedroom door off white? The hall side of the door and all the trim is stark white.