I use a ForeRunner 405 to record my cycling to work in the morning and back home in the afternoon. When arrived at work I stop the timer and start it again when moving back home.
The total time displayed on the watch is ~55 minutes. However, the Garmin connect interface shows the "Time" as more than 10 hours , which is the same as the elapsed time.
I did not experience this in the old version of Garmin connect.
Example: http://connect.garmin.com/activity/459937214
Daniel