Your stepping in to van expediting at the worst possible time.....I've been driving a van for 9 years and have not seen it this bad since Obama got in office for the first time.
With flat rate you always know what your getting a mile because it's set in stone in the contract....how ever I have seen the carriers run loads thru their brokerage divisions to skim then bid on said load and tell a driver that's whats in the load.