Speaking from experience at working at a Marriott previously... inventory is NOT automatically closed off and a person typically will do this. If it is a smaller hotel or a very busy hotel that has the person doing multiple duties, they oftentimes get side tracked and don't have time to do this. Ancient system, I know, but have you ever gotten a chance to peek on the other side of the counter? It is not Windows 7/Mac OSX... it literally looks like a DOS screen for full service for most hotels in the states and something barely better for limited service.