Reading between the lines this is what I think happened.
Guys are drunk and break down the bathroom door. They get confronted by an armed security guard who doesn't let them leave. The manager shows up and threatens to call the police unless they pay for the door. Given the swimmers don't want that, they cave and pay for the door, and I suspect pay far more than the door is actually worth. Thus, Lochte perceives this as a robbery (i.e. armed guard won't let them leave and gets far more money out of them then he should) and then Lochte tells his mom about it and while doing so leaves some things out and embellishes other parts. His mom tells the press and then Lochte has to cover for his mom.