Hi, There are different factors that can cause the watch's step count to be inaccurate. However, you may need to verify how your steps are being counted by Samsung Health.
Factors that cause inaccuracy
The accuracy of the watch's step measurement can be affected by the following factors:
Make sure your watch and the Samsung Health app are using the latest software.
Environmental and skin conditions may affect how well the steps are recorded.
Steps are not counted when there is no hand movement in the exercise. For example, steps may not be recorded when pushing a lawn mower or cart because your hands are not moving. The watch is intended to calculate real step counts while walking.
Walk naturally without looking at the watch or your shoulders, elbow and wrist being raised. When you walk looking at the watch, the accelerometer will not properly measure your steps taken, distance traveled, or even calories burned.
The step count may not increase immediately when walking or exercising due to the step count algorithm. When the algorithm detects 10 continuous steps, the algorithm starts to count your steps taken and updates the step count.
You may experience a brief delay before the Steps app displays your latest step count. There may also be a delay before the Goal pop-up window appears.
If you use the steps tracker while traveling by car or train, vibration may affect your step count.
Annoys the flip out of me as well. Current month leader has 1,011836 steps which if you break it down over 6 days, 16 hrs a day is over 10,000 steps an hour. Just not possible and your cannot report them even tho the rules say "Where dishonesty or fraud is detected regarding the number of steps, you will be dropped from the current challenge and be unable to participate in the same challenge again."
Definitely discouraging but I try to ignore it and just see how well I can do each month.