Duplication of exercises with MyfitnessPal (Pixel watch)

[aht116]

 The Fitbit app is synced to MyFitnessPal and it keeps duplicating exercises. I log my exercises through Fitbit, manually starting particular exercises. For example below, I manually started the strength training exercises on my Pixel watch when I started, and ended it when I finished). Later on, the Fitbit app suddenly duplicates this training with the label (MyFitnessPal) with different calories. The calories in it are also added onto my calories burned for the day.  How do I stop this?

[Rich_Laue]

You are not manually adding any logs to my fitnesspal 

[aht116]

I click Strength Training and Treadmill when I start my workout. Is that really all you had to reply about my post?