What do you have #2

[egj13]

Here is the other play discussed last night:

V team is beating H team by 30+ in the 4th quarter (not sure on time left). H calls a time out to draw up an inbounds play from their own end-line. They break huddle and line up in a stack on the far lane line from the benches. H6 realizes he doesn't have a place in the stack since he isn't supposed to be there so he turns and runs towards the bench. As he is doing this, the L hands the ball to H1. He lobs the ball to H3 who puts it in for 2...at this time H6 is seated on the bench. T whistles and whacks the bench for 6 players on the court, gets together with the L and they wipe the basket off the board.

Were they correct? What would you have done?