Iíve checked with our analytics group and there doesnít appear to be any issues with our conversion counter which makes me wonder if this could be a situation where your tags were mis-installed. I'd suggest you check in with customer support on this or feel free to private email me with your contact information to resolve the issue.
We have had a similar problem for months now, and this is on a large scale site. I've seen some incredible stats from YSM - 1 click = 41 conversions! Thats a 4100% conversion rate yeeehhhaaaar! :0) To be fair, multiple conversions are achievable (and expected) for this site, but still 4100% thats just too good to be true. Having cross referenced with our own tracking stats for a few months it was obvious that the number of clicks being counted was about right but the number of conversions was consistently +50% No explanations from YSM yet though, we were told to check our tracking code snippet had been inserted correctly, which we did, and it was - makes no sense really, the clicks are tracking alright afterall!?