infield fly rule question

[tankmjg24]

I was umpiring a youth game recently (U11) and the coach for the defensive team was not only an umpire, but a board member and the assignor for his association. (Later was told over 30 years experience)

0 outs with R1 and R2. Fly ball hit between F5 and F6 and both start to merge to it. F6 is camped under it as my partner and I are signalling infield fly. At the last second F5 reaches over to catch the ball as is F6. Ball ends up dropping to the ground.

3rd base coach rightfully starts yelling to his players to stay put that it was an infield fly. R2 listens, but R1 does not and we end up having both standing on 2nd base. F5 picks up the baseball, tags third, then throws to F4 at second. F4 tags R2 who is on the base (so we have a safe call) and R1 starts running back to 1st. F4 then starts to chase R1 back to 1st and we have a run down. R1 is eventually called out heading into 1st for being out of the basepath.

3rd base coach calls timeout and I think he is going to argue runner out of the basepath but he just wants an explanation as the defense is yelling they just turned a triple play. I explain it to him, he says ok, then I have the defense come out. This is when our fellow umpire friend royally screws the pooch. He wants a triple play called as according to him the first out is the infield fly, the second out was the force at 3rd, then the 3rd out was the out of the basepath at 1st. Tried to explain it to him, but he was adamant that he was right. Then he becomes personal and can not figure out why he was ejected haha. Just goes to show you that some doing our profession do not know all they think they do.