ABC Coach wroteAccording to all the posts I've read, I called the play correctly.
If I understand your narrative, you didn't quite call the play correctly, but you were close. Let me take your scenario, remove the parts that don't matter, and comment:
The guy gathered the ball with his right foot down. He then stepped onto his left foot ...
OK, so now the right foot is the pivot foot.
...the shooter pulled his right foot up
Still legal...the pivot foot is lifted.
to meet his left and just stood there
As soon as the right foot touches the court again, we have a travel.
while the defender passed.
And here's the small error---you don't wait for the defender to pass. This is a travel as soon as the right foot retouches the floor.