Thanks. There are still a few bugs in the handling of multi DNFs (1/2 DNFs in particular); I know the current weekly ranking doesn't distinguish between 0 points and DNF either. I'll see what I can do about those problems sometime in the next week or so.On the current personal records page, for your multi-bld history, it doesn't take into account whether a solve is a DNF or not when it highlights it orange (to indicate a PB).
For example, my first solve (1/2 DNF) is highlighted, then the next several DNFs are not highlighted, then I get a faster 1/2 DNF later and it highlights it orange.
Still not sure about multi best of 3. If nothing else, there's the fact that it will really fill up the database with scrambles...