I tend to get annoyed by major deviations from canon and 'simple facts your high school should have taught you' problems (these are things that tv writers often get wrong, like on Smallville, when Lana Lang is a sophomore in high school and also the manager of a coffee shop not owned by her family. Child labor laws, anybody?). That being said, I would not have noticed the issue with Bates, and I would chalk up Rodney eating donuts to Rodney's relationship with food, which seems to favor quantity over quality. If it's round and sweet and doughy, it seems to me he'd be quite content to call it a doughnut instead of mumbling through whatever they call it on P3X 432, you know? But I tend not to sweat the details of canon unless it's something that I think would impact the characterization of a major character.