Thanks for your response!
So now that I've gone through my P&L more thoroughly:
1) I actually lost money on my long SVXY trades, even ignoring the time I was short.
2) Separately, I also traded VIX futures directly and lost money on them. I am reporting this as section 1256 contract P&L.
3) I...
So I appear to be in the most bizarre position as regards SVXY - I haven't found anything about this on the net. In fact, it appears that basically nobody has any idea how to report K-1 trading P&L properly in their taxes, which is hilarious because these things have been around for over a...