I may just be misunderstanding the sort criteria, but the sort order when using Sort Transfers By -> Activity seems counter-intuitive. If I have the order as ascending, it shows the most active transfers at the top, but I would expect that to be reversed.
By contrast, when sorting by Progress/Ascending, the transfers with the most progress are at the bottom.
The only thing I can think is that they are sorted by the amount of time since the last activity, meaning the the least active are "higher". Is this what was intended, or a defect? BTW I don't know if this is Mac-specific, since I only use the Mac version.