Flying non-rev (89-DAL) out of CAE into ATL on ASA at 6am I have been bumped off. . . 3 times, due to a weight restriction. Each time I ask about it. Each time I get the answer "Well the flight isn't full . . . we have 4 empty seats, but luggage and fuel won't allow us any more." My jaw drops every time. I never understand it.

Makes sense now, thanks guys.