Seasonal employee concerns.

I'm a seasonal Starbucks barista. I'm a little concerned with if I'm gonna stay hired or not after my 90 days or whatever. I am always on time, but the latest I've been is two minutes one time. Next, for my closes because I have to get used to closing all by myself I usually stay 15-20 minutes late to get things done, clean, and stocked, as My Starbucks manager is a big stickler. I'm talking I can't put the ice scoops upside down without him bringing it up. Would they be mad at me for that?