Burned calories - wrong calculations

Garmin wrong calculate burned calories when watch is on hand without tracking activity, but you use eg. Garmin Edge 530 for indoor cycling.

Difference between whenwaths is/isn't onhand is around 500+ kcals on daily summary.

I did training indor cycling with smart trainer using Edge 530 (Edge 530 was connected with externar heart monitor) and I had watch on hend then watch detect higer heart ratio and started calculated some burned calories. After sync Edge to garmin connect the calories was doubled. Connect added up calroires form watch and edge.

On heart daily diagram is heart rate from watch not from Edge, in my opinion is a bug because avg heart from activity form edge was 140 bpm but on diagram is 120.

When I take off the watch from hand then calories are only from Edge but on heart daily diagram is no data during activity (Edge was connected with heart monitor and in details of activity is heart rate).

I contact with garmin support but they told me everything is ok this is not a bug...

But guys this is BUG. System have all necessary data to do correct calculations and ignore active calories from watch when we sync activity from other devices.