At my store your team leader does the review. I remember last year I was called to their office and was there for a minute, told I was in the high percentile and if they could they would have given me more.
No, you will be fine, just make sure you clock out. The ETL told you to do a punch correction as they were caught up with something else. You should be fine.
My store only uses the swap book, however when I am looking to have someone cover my shift I will go on kronos and put it on there incase someone sees it and wants to work it and then goes to the swap book to see if it has been covered yet.
My store has the hours, but they still schedule 95% of people the bare minimum and then every day on walkie they will be like "if anyone wants more hours, find me. We have them"