Hoping someone can provide some info on this. I'm not sure whether it's a glitch, a fix request, the way an organiser has set something up or something completely different. Looking at this as a runner rather than an organiser.
I've seen a few events where people seem to be credited multiple times for a control, and you see
(Extra) in the results next to the control number. I'm not sure whether these are HITMO edited, but here's a recent case in point:
I don't know whether this is exclusive to Score-format events, but that's where I've seen it predominantly.
Hopefully this doesn't come across as sour grapes - I'm not trying to get anyone penalised but trying to understand how and why it happens!
Cheers