What you describe has been going on from the start with the food stalls. It is part of the game as far as I can tell.
My advice to you is watch the timing on when you order and try to do that when there are no other sims in front of the booth. Hard to do at times if there's a crowd. Don't try to have more than one of your active sims try to order at the same time either. Usually, when you do, one of them doesn't get their order and you have to reorder.
Hope this helps.
I'm sure it's design, and I like it too, if they steal you food, no worries, steal someone else's food before they take it, it works both ways!
