[fletch_irwin_m]

This does seem like an odd situation.
7 seconds is an eternity in basketball. Was team A guarding team B? Was there any communication between the officials? Was there a TO before the FT?
I am not sure why you would not "do over." In theory, the ball is still "dead" because the second free throw was not attempted. What would make it difficult would be if the two teams played the last 7 seconds, the officials positioned themselves for the last 7 seconds, and not until the game was over and the officials were notified prior to "leaving the visual confines of the court" about the un awarded FT. I would not want to be in that position.