OK, so I did an evening session around brands hatch, (England) Indy circuit the other night. connected via my xgps150 at 3.9/4.0 hz compression was default set to low and its giving me random times around 1.30 and 1.11... while my gopro video footage is showing me 59 or 1min laps. why could this be?

Still only getting a max of 4.0 or 4.1 refresh with new v17 software and 1.2.6 filmware