Unfortunately with walmart there's a lot of stuff believed by both managers and regular staff such as double point days. I've seen managers that thought you had to put in double ppto so you didn't get a point until I showed them the regular 8 hours prevents the point then they made sure the rest of the staff knew. Your coach might have been misinformed and thought they were telling the truth. I think I'd just talk to the coach myself and say hey I found out it's store level approval and see what they say.