Doubled up my data after syncing to Apple Health! – Fitbit Export Review

I wanted to import my data from Fitbit after switching to a new Versa light from my Apple Watch. I had previously used a Flex for several years before switching to Apple Watch. I’m now disappointed with the Apple Watch. I downloaded this app and synced the data from Fitbit to Apple Health. When I looked at the updated data it doubled all results from previous days! What? Why? How can I undo this ? I will increase my rating if this can be fixed.
Review by Chickaboo62 on Fitbit Export.