Why does the S62 count golf cart miles for my daily miles in Connect app?

The watch offers the feature of recording golf rounds saved separately as an activity, in addition to the separate scorecard from the round. 

If the, "Save as Activity" option in Golf Settings is enabled, connect will store the saved round of golf as an activity, which will have the GPS map and location throughout the duration of the round. 

The distance for the golf activity is simply showing the distance covered within the activity, and steps are not associated directly with the golf activity. 

The watch continues to track steps during an activity as it does throughout an entire day normally using natural movement of the arm per how the sensor is programmed to track throughout your day when you are driving a car, in public transportation, etc.

The golf cart during the round is not affecting your steps, and the distance during the round of golf will be a combination of both walking/riding in cart to account for the total distance during the activity. 

The distance recorded during the golf activity are not attributing to the calories burned during golf activities. The actual movement, heart rate, and then user profile for age, height, weight, gender are all of the factors contributing to the calories burned. 

Regardless of whether you are walking or riding...the calories burned will not be affected by the distance recorded.