I've shimmed and adjusted the lower piece, and if that doesn't work I'll remove the sims from the lower and shim the upper piece. It closes tight, hinges are good, the and the glove box door doesn't jiggle at all. If this eastern PA weather ever breaks, I'll take it out for a ride and see if it worked.
Yea I think sometimes that lower sprung steel bar on the fixed non latch side just wears out and won't hold itself high enough to stay latched. Give it the old burnout test haha!