Talking about strange things happening (we were, weren't we?), how about this puzzler:
A week or so ago I purchased a box of oatmeal-coconut cookies, which sounded tasty. The box had a cardboard zipper on it, which you pull to open. I opened it to find two plastic trays of cookies, each wrapped and sealed in plastic. EXCEPT, the top tray had been opened and several of the cookies missing! I didn't keep the box so I can't really check, but I keep wondering if there's a way to somehow open the box without undoing the zipper. Otherwise, the theft must have occurred at the factory. I tried the untampered with cookies and didn't much care for them and don't plan to buy them again, but it has left me wondering.