I tried a search and didn't see anything immediately pop out at me for this issue.
Normally I use auto-lap at 1 mile increments, but decided I would manually "lap" for a race today in order to have the splits match the course marking. I found the course was poorly marked (and I possibly ran awful tangents) and also noticed the activity in Garmin Connect shows really weird lap marks when I click "Laps" on the map view.
It was a 13.1 mile race, thus I had 14 laps (13 x approx 1 mile, 1 x 0.1 mile in a perfect world). I only see it plot 7 lap markers.
Any ideas?
For this activity: http://connect.garmin.com/activity/125047790
Secondary comment, I think it is funny how the activity rounds time. My 1:34:59.5 was rounded to 1:34:60 (1:35:00 maybe makes more sense?)