U call it

[Adam]

Back to the original sitch. You could call it a false multiple double. False because they weren't all at the same time. Multiple, because you have teammates committing fouls in the same dead ball period. Double because you have opponents committin fouls during the same dead ball period. You would penalize each foul in the order it occurs.
First, your foul by B1 results in free throws by A1.
Second, your double fouls by A1 and B1 result in techs assessed to each player, and you go back to A1s free throws for POI.
Third, your double fouls on A5 and B5 result in techs assessed to each player, and you go back to A1s free throws for POI.