In some cases the watch shows a different active calorie total than the web or the phone app (anywhere from 20 - 100 or so fewer active calories on the watch) even after syncing it several times.
I would say that in general there are a lot of inconsistencies between what the Garmin watches display and what gets transferred/calculated on Garmin Connect.
I suggest not to fuss over it as it doesn't really matter in the end. Most of Garmin's "metrics" are supposed to be taken with a grain of salt ...
