Yes, if the max down time is the duration of the longest drawdown as I assumed, then it would be indeed a bug. The longest drawdown is about 130 weeks in your chart. I'll look into that and will find out what the max down time is supposed to be. Thanks for the info about that inconsistency.

Update: I was told that it is in fact a bug. The max down time is wrong when equity peaks rise above the preceding balance peak, as in your chart. This will be fixed in the next update.