Yeah, that’s not right at all. Would it be possible for you to provide me the extensions data? I’d ask you to take a screenshot of the Sprite Statistics dialog window and then go to Edit > Preferences > Extensions, then select the Time Tracking extension from the list and click the Open Folder button. In that directory there should be the “_pref.lua” file with extension data.
It will have all of your session times with filenames so I understand if you don’t want to necessarily share that but it’s the best way for me to try and figure out this issue. ✌️