When I run the attendee report for one of our recent sessions that was just one day it is showing a Yes under the Attended column but then is empty under the Time in Session column. There is a name and email there although I hide it for the purposes of posting a picture of what I mean:

All other attendees that show Yes under Attended have a value of Time in Session and the ones that don't all have a No for having Attended. Any idea on why this may be happening or what it means? As if this person didn't actually attend then I need to follow-up with him if not then we are all set and I can finish out the process we have.
Thanks in advance for any assistance,
Melissa