I have a display controller that has two child viewing controllers. One sits on top of the other and can be pulled around the screen overlapping the other child's view. I can interact with the nanny controller that sits at the top, but when I try to interact with the child viewing controller below, it doesn't work. I try to contact the child viewing controller below, where the above does not overlap, but the top still remains. If I disabled user interaction on the top child viewer, I can interact with the lower child viewer, but I find no other way to interact with the other when I touch an area not covered by the first one. Has anyone discovered this problem and found a way around it?