I had a 50 hour work week when I worked at ups and the owners/managers basically blamed it on me like they weren't the ones scheduling me 40 hours and asking me to come in or stay late.

This. In my state it's against the law to be scheduled without a 24 hour rest period in between a week period. There's a lot of ways around this, such as getting off at 1:30 pm and being scheduled to start at 1:30 pm the next day, but I believe it's Starbucks policy that they cannot schedule you on your day off on your availability sheet, and if they do they *must* get your expressed permission.

It’s so weird, I never work more than 25 hours ever. I just got a new manager this past week and suddenly my hours sky rocketed. I ended up texting my new manager and she said she didn’t create the schedule but my old manager never put hours like that on my schedule because he’s aware of my schooling times... and my schedule was updated too, as in I had my normal hours but someone changed them.