Users have reported that the total time of across activities does not add up to the total time of that trip. We understand why this should be confusing but there is a good explanation for this. Individual activity time is the specific time for that leg of trip. It does not include idling time spent at signals or waiting for the next activity leg to start. However the complete trip includes this wait time as well and hence we see a difference. So if individual legs add up to 25 minutes and the total trip time is 30 minutes, time spent on waiting is 5 minutes.