I think it probably happens a fair amount - at the last race that I did people were walking up to the results list and contesting it all over the place - and the person keeping track kept just putting them in where they said..... Ours was a pack finish so it was hard for them to tell. When the final results were posted on the web site they were quite a bit different from what I saw on the day of the race - good too, since I kept getting moved down the list from other people claiming to have come in ahead of me. The final list looked better, but I still think I probably came in higher than I was put - not that I really care between 5th and 7th, but one would think that they could do a better job. We don't use chip timing either, but from what I understand in a pack finish like that it doesn't work - you get the pack in a big lump anyway? Our races use video for close calls - but not the really sophisticated stuff you see at pro races (though they do have that down in Oregon - cool). I think I ended up further down than I think I was because I am very small and I was on the side that was farthest away from the camera - I probably wasn't visible past the other riders