Crafty, I've got something similar in my boxes. I've got three sets of numbers -- one for US $, one for Australian $, and one without a sign. In my auctions above, I have three in US Dollars, one in Australian dollars, and two that don't show what currency they're in. The last two are older than the rest -- maybe from before some feature was implemented? Or else somehow AS can't tell what currency it's in? Do you have any auctions above that don't show what currency they're in, and if so, do the totals match up?
I think it's just totalling the auctions showing in that folder, so if you're saving your wins and losses elsewhere, that's why you've got 0's in those boxes.
Interesting note: the auction I won two days ago is still listed in the "Active" total box, not under "Won".