Last night's tip fiasco was made better by the people who can make it better. They were more upset about the till be off as a result than they were about the tip itself. Apparently the stylist got a talking to for insisting I take the money out of the till - that's a Bad Thing and apparently she knew that. But in the end she still got her tip so I'm pretty sure she's not too upset about anything.
I still feel bad about the whole thing, and I'm not sure how they rectified the situation; at this point I'm not going to push it anymore and move on. I think I'd have gotten in a lot more trouble if I hadn't had the "new" label so firmly affixed to my forehead. The subtext was pretty clear: don't do it again.
Tonight's till was perfect and no one complained about missing any tips, so I am considering it a Good Night. Although it still gives me some stress, tonight eased my mind a little. I still really like everyone there and it is a good place to work. I am very thankful for this job and appreciative of all the help (and patience) they are giving me. I want to do right by them.