After several of my coupons not doubling or tripling last night, I went back to HT tonight.
For $5.44 I picked up:
3 Quarts of Promised Land Milk
1 Reynolds Recyled Wrap
1 Hormel Compleats
2 French's Mustard
3 Huggies Wipes
The Promised Land and Huggies Wipes coupons specifically said "do not double or triple" but were accepted by the system anyway.
I was honest and asked the cashier about it and he said that they are NOT supposed to do that and it is a flaw in their system. He also told me that if the coupons went through, he wasn't about to override them.
So, I guess from now on, it will be YMMV and you'll have to watch like a hawk. I know I will be and anything that doesn't double or triple, I will have them remove them from my order.