Well things have continued, so it's definitely my period... 6 days early. Can't figure out how to explain that given the ovulation test only being on the early end of the range.
Regardless, after entering the new information into mymonthlycycles it didn't shorten my average cycle calculations, much to my surprise. It does however have me needing to place my next order for next week. I think I'm doing both of 4102 for this cycle, 24 hours apart. Of course, then the question is when will I actually ovulate, right?