I have a double pocket door that I installed some time ago. Since I couldn't think of any way to stop each as they approached the center point, I put some long screws in that stop the rollers on top at the header. This normally works, unless someone gets a little too forceful and then the bottom slips out of the pocket! Basically what happens is the door cocks, allowing the bottom to come out. Any ideas on how I can resolve this without ripping into the drywall?