Out of bounds question

Yep, seen it time & time again. That's an easy one because of the made basket. Get a rule book coach(es)!!

I had a spot throw-in last night on the endline following a violation, the player moves one step left, two steps right...

Partner puts that real confident air in the Fox 40 & crisply signals traveling violation.

Since it was a "playoff game" we conferenced & I tried to explain to him that:
1. there is no travel on a throw-in
2. the spot is 3 feet wide & depth is no factor.

He didn't believe me so we bet the pay for that game... Had 4 games, 1 was a forfiet so I got paid for 5 games & only worked 3