After syncing, all my activities, even those registered in MyFitnessPal appear in my activities list in Garmin Connect, except my last run recorded on my Forerunner 610. I can see the activity on the 610, and feedback from GC suggests the data was synced (e.g., returned sync successful, 1 activity since yesterday, etc.). However, the activity does not appear in my activity list on GC.
Other potentially relevant info:
I have recently connected GC to MyFitnessPal, and the activity I'm trying to see is the first (test) activity to see if the two apps play nice together (possibly not).
I'm trying to sync using Safari on Mac OS X Yosemite.
Thanks in advance for any advice you might have.