John,
We have had the same problem with ALL of our latches--we have had 3 PC's in 3 years and the latches consistently fail. We have called Carol, at the factory, and she has sent us replacement latches. Now we have a stash.
I am sure that it is a problem with the latches that PC uses. Down the road, we will probably look for something sturdier but for now, we will keep replacing.
When you get back from Mexico, give the factory a call.
Judi