I don't know much about that particular sight, but from what I've read on the net about it... It says it has range finding capability, and while most everything we shoot here is ASA and not IBO and I'm not sure of the differences in regulations.. That would be a BIG no-no in my neck of the woods for ASA. You're not allowed to take anything that is capable of telling you the range of your target that can't be carried in your cranium.
Just looked at the IBO rules on rangefinders, and this is what it says:
1. An integral part of IBO 3-D competition is the archer’s ability to judge yardage without the assistance of range-finding devices or assistance from others. Therefore, cameras, rangefinders, or any other devices that may be used to calculate yardage to the target are prohibited. An archer may not use parts of his or her body, the bow, or any other accessories or equipment to calculate yardage. Any mark on otherwise legal binoculars that could be construed as a reference point for range finding is prohibited.
So, I guess they might have a legit complaint with your sights..