I've got a set of French doors that each have about 1/4" of vertical twist. The latch mechanism is a detent ball in the top of each door, and either door will stay closed independently, but together they touch at the bottom before the primary door latches at the top. Pushing on the door will get it to click, but the twist is strong enough to pop the door back open as soon as pressure is released. Pinning the secondary door at the bottom isn't an option because the whole doorway is only 30" wide. Suggestions?