Management is in and out of the office with no regard to posted business hours.
Shipping company says your package will be delivered today? Great! But you won't get it. Either the office will be closed for no reason and the delivery person unable to leave it, or the office will accept your package, lock it in the back room and be closed when you stop by to retrieve it. All of course, within the time frame of regular business hours that management has posted they are open.
Office closed because they're out to lunch? Don't bother coming back at the time they specified they would return, they won't be around for at least another half hour.