Player Out of Bounds/1st to touch inbounds

[knockitoff]

Had a play in a BV game last week where B1 in an attempt to defend A1 on a fast break, while hustling to get back on D his momentum carried him off the court under A's basket. The shot was missed, the rebound was "popped" straight up by players from both teams. In returning towards the court, B1 took two steps OOB, his third step was "in-bounds" and was a "leap" towards the rebound, which he eventually recovered with one foot very near the left side block and the other in between the block and the second hash mark. I called B1 OOB because he did not have both feet back "in bounds" before he touched the ball. B's coach didn't like the call, but accepted the "he hadn't returned to the court" response.
One thing that made this play so difficult, was the fact B1 recovered the ball so far onto the court.
Have not found a clear description of "return to court" in the books.
I procured a DVD of the game, have watched it many times, and still think I was right.