Make sure the rear latch pins are correctly centered in the hole in the receiver assembly when latching the bow down, and the receiver mechanism is properly lubricated and moves freely so it catches the pin securely. The top skin may simply be installed stretched too tight; they weren't tight and wrinkle-free when they left St. Louis, but many trim shops install replacement tops too tight so they don't get customer complaints about "wrinkles", which leads to latching and retention problems.