Unfortunately, I have no time to test/support additional browsers. Can the TOR browser install extensions from AMO? Did you already try to install BATify in the TOR browser? Goes all traffic in the TOR browser automatically through TOR?
In the meantime, I were able to reproduce the problem . It will be fixed in the next version which will be available very soon.
Do you want to contribute to the sites with the wrong visit time amount? If not, the easiest would be, to delete these sites via the trashcan button. If you want to contribute to them, please let me know. I'll think then about a solution for this case.
Fixes #15: Switch from beta to release status Fixes #16: At "last contribution" the wrong date is shown Fixes #17: Change voting commit delay Fixes #18: Better format dates and amounts in contribution history/contribution history details