Should I Overrule the BU?

[Matthew F]

This stitch happened 5 years ago before the "Get it right at all costs" mentality really took hold - we did go for "help" on check-swings and swipe-tags or a pulled-foot at 1B, but that was pretty much the extent.

Over 40 league, OBR. R2 on 2B, 1 out. BR hit a deep fly to F8. BU in position for catch and tag up; I'm moving to 3B for possible play. R2 leaves before F8 catches the ball and beats the throw to 3B easily. Defense appeals to BU, but BU calls him safe. The defense then appeals to me and I tell them that the call is the BU's and that I had to get into position for the play at 3B - the BU's call stands.

I know without a doubt that R2 left early - I think the only person on or near the field who didn't know it was the BU. The UIC of the umpire association said I did the right thing, which provided some relief.

Granted this happened several years ago, should a stich like this, nowadays, be discussed between the umpires to get the correct call? I find this stitch akin to having the PU call a strike on a check swing and then the BU overruling the PU saying that the batter didn't go - taboo in my world.