Bed separating from wall

[hamcamper]

The bed has separated from the wall in my 2007 3400RL twice. I essentially disassembled the bed the first time and rescrewed it back to the wall. It has just recently reseparated and I am thinking that I didn't reattach it properly. Each time it happens it is preceeded by the top not sliding out with the bottom. I have pushed on the top to see if it was binding and it pushed out easily. I can't figure out what is going on. Has anyone had this problem and if so how did you fix it?