Hey @david,
I just noticed some duplicates in my activity history. A few weeks back I switched from a Strava connection to Dropbox and also imported my Wahoo activities from a few years back. For example: On 10th September 2019 I had two commute rides, for the morning ride it is imported correctly, but the afternoon ride was imported three times. Another occasion is on 11th June 2020, 1st July 2019, 15th May 2019, … There are no duplicated fit files in my Dropbox, I can just guess that something went wrong when bulk importing hundreds of fit files at once.
Best regards,
Sven
Edit: Maybe you could also show, for example on hover, from which file the activity was imported instead of just “Dropbox”.