Does that cash number (starting balance) update throughout the season? If not, and that is how it does it then it sounds like the game is using the wrong figure for cash. Surely it only makes sense to use the current balance figure and not the year's starting balance. Whether the revenue is earned or not I don't think should matter (that's more an accounting issue). If the money has been given to you (again, some of it probably shouldn't be, but that's a separate issue, then it should be made available to dispense how one sees fit.
I obviously don't make many trades involving cash otherwise I should have known this.
