I had to adjust my latch post once and found that it appears to be on some kind of 'etcentric'. Loosening the latch post/bolt I could rotate same and retighten.
Hope this makes sense as I describe it?
Jay & Peggy Monroe with Dolly
Can't take it with you - don't plan on leaving any behind
2016 Newmar London Aire 4553, Spartan chassis
Wrangler Unlimited toad