It's too bad that one went missing to muggles.

It's BACK!

"Missing" is not strong enough for what the muggles did to that box! It was pure, unadulterated destruction. Everything was in pieces! (shaking head)
(I'm sure they were generic muggles, not geocachers.)

I don't know of a hybrid around here where the stamp was taken.

Judging by many years of (mostly anecdotal) evidence, I would say you are definitely bucking the odds. Which makes sense, since I've always considered you an odd bucker.

The stamps show up missing so many times in a hybrid box.

Knock on wood, the hand-carved stamps in my three hybrids have managed to survive thus far. Those who have found them have been experienced geocachers, for the most part. Finding them pretty much requires reading the clues, like letterboxing, not just searching gps coordinates so people have to read through my multiple requests to not take the stamp.