It simply can't be that the tracker is accurately tracking stats for everyone except you, if there is something affecting usually more people will complain of inaccurate stats. During the past couple of days there were a few tracker downtimes of a couple of hours which might explain some of those inconsistencies.
True, it shouldn't account for such a massive upload loss since interruptions weren't that long.
Only thing that might explain it was what Arveene already mentioned, it is possible that the tracker times out and you are unable to connect and report your transfer, but still remain connected to other peers and seed...
Things I can suggest are - check your firewall/router configuration, check up on tracker status line every now and again and possibly enable encryption and set to forced in case your ISP is messing with you (although this would be a first time I heard of such ISP meddling).
Actually, recently I've been noticing more of these reports on the help forum. I think this might be the fifth or so report in the past, I dunno, month? And remember not everyone monitors their stats closely. I, for one, just leave my seeding box running and check it about once a week, so I don't expect to be submitting such a report.
I'm starting to think that maybe there is a bug somewhere. And, as noted, the differences are quite large, which is also consistent with other reports I remember seeing.
I think it'd be a good idea to at least take a look. There might be a problem, there might not be.
And shaggy619, don't double post; it's in the forum rules. If you want to say something and the last post on the thread is yours, edit your last post instead.