I had a similar 1 and 1 situation happen during a JV boys game this year while I was administering the free throws. The first shot is no good but nobody reacts. A Team A player grabs the ball and throws it to me just as his coach starts screaming that it is a live ball. I stepped aside, let the ball go out and pointed the other way.
I clearly announced one and one, so I have no idea what was going on there. I even confirmed with my partner that I had announced it. Guess they weren't quite ready to play on a Saturday morning.