The system requires that each hole has a tee shot on it, if the watch misses the recording of a tee shot the system will automatically add a tee shot in with a driver. This is because on the majority of tee shots it will be a driver that was played.
If you did not play a driver then you can change this in the editing/signing off process.
If you are continually getting this issue then there might be an issue with the watch. Click here for more information.