Basically, some guy in Australia measure one and a footlong came up to only 11 inches. Then some other people started researching and found over half were coming up short.
Here's the thing though. There isn't some magical machine making these things exactly 12 inches. These are people rolling some flavoring into defrosted rolls of frozen bread. They're not all going to be EXACTLY 12 inches. It reminds me of things like other fast food places. That quarter pound burger you ordered isn't going to be a quarter pound. Because when you grill or fry it, it shrinks a ton. Same thing here pretty much. You have to allow a little discrepancy.