Well, it's Behr. Most likely the paint needs time to cure before it will achieve good adhesion. Be careful with it and don't do any washing for 2-3 weeks.
If you still have problems you will need to remove as much of the Behr paint as possible. Washing with hot water will do a good job loosing the paint. After it is removed use a good primer, do any patching needed to get the walls in good shape and repaint with good paint (not Behr).