Manually inputting exercise after wearing FitBit — double counting?

[JustinBarzak]

So I ALWAYS wear my Versa, except when I’m showering or when it’s charging. I’m extremely active, and a lot of times the FitBit won’t pick up GPS/satellite signal before I enter a run. I proceed anyway and still wear the watch. I use a run tracking app on my phone that shows time/pace/distance and I then go in after my workout and log my distance and pace. 

Is this process counting things like calories burned and steps twice? I would think it would be designed to overwrite if I do it manually, but I’m not entirely sure. I’m mainly focused on my calories burned and active zone minutes. After I’m done running the calories and steps go up before I manually log them, and then once I do they go up quite a bit (I tend to run longer distances), but I want to make sure they’re picking up accurately and not counting twice.

[JohnnyRow]

When your run does not get recorded, it's not clear if you are saying you tracked it via the Exercise App, starting and ending from the tracker, or if you relying on run being auto-recognized.

And I'm not sure if that matters here, but if you were not using the Exercise App, then

what you enter when manually logging a workout totally overwrites whatever was actually recorded.  That includes your calorie burn and I think heart rate.

If you actually recorded it with the Exercise App, then re-entered it for the same time interval, I expect the same is true about just overwriting it but I am not totally sure.

In general, when you manually log a workout, it is like Fitbit is assuming you are doing so because you were not actually wearing the tracker so it just uses whatever parameters you input to guess at the rest, ignoring whatever data was actually recorded.