Android app duplicate activities

[SunsetRunner]

So the Fitbit app on my phone logs most runs and walks twice. I say most, it doesn't every time but it's probably like 9 times out of 10. And the duplicates aren't quite the same, one will be slightly longer with a few extra steps. If I delete one of them (I usually pick the longer one as I know how long I've been and it's times are too long) it deletes all GPS related data for the other one too so anything like pace, route etc all go.

• I manually log my walks and runs using the app on my Samsung Galaxy S8 phone rather than use my Sense. It's just more convenient as I start podcasts at the same time and in this cold weather I have a jacket on when I run making access to the watch more awkward.
• I've tried logging activities using my Sense for comparison and so far those have been ok.
• In trying to get to the bottom of this problem I've tried the following:
  • Disabled MobileTrack
  • Disabled auto tracking of activity in Samsung's Health app
  • Disabled FitBit's automatic recording of activities

I also have Strava syncing enabled - I don't record anything in Strava, I do it in FitBit and let FitBit sync to Strava. Weirdly, nothing ever gets duplicated in Strava.

I've recently got up to running 10km and when I've gotten back and tried to clean up the inevitable duplications it's lost all the useful data. It's maddening.

Any suggestions would be greatly appreciated.

[JohnnyRow]

There are too many variables there for me to fully understand, but do be aware that when you manually log an activity after-the-fact, it uses whatever parameters you input and disregards data that was actually recorded;  it is as if Fitbit is assuming the reason you manually logged it is because you were not wearing the tracker during the workout.

[SunsetRunner]

Oops, I described that so badly. Apologies for that.

What I meant is that I press the + next to the little guy in the orange circle and then press the pink play circle.

[Theycallmedim]

Similar issue for me as well.  Here is the situation.

I go for loop walk with the same starting and ending point.

1. I am using the Charge 4
2. Start with selecting Hike as the exercise on the Charge 4 
3. Start recording the exercise
4. Open the Fitbit App using the Samsung A71-5G (T-Mobile)
5. Add exercise = Hike
6. Start the exercise in the Fitbit App

Post exercise:

1.  I Finish the Hike on the Charge 4
2. I end the Hike on the Fitbit App

On the PC I find 2 versions of the Hike 

• One has the elevation gained
• The other has the elevation gained as 0 because I ended where I started. 

I delete the one that has 0 elevation gained.

Do I need to use both the App and the Charge 4? 

How do I get only one record with the elevation gain?