Here are the most common mistakes that helps troubleshooting for having troubles with allocating the 1on1 meeting timeslots:
Double sessions for a host
Tip: export list of sessions to find outMore meetings for 1 attendee to be able to join within timeslots (often happens when eventmanager start to seat people in meetings)
Tip: export list of seats to find outEventmanager seats hosts to have a meeting with another host while having meetings themselves within the same time-frame.
Tip: export list of seats to find outSession starting times are not correct, should all start at the same date & time
Tip: export list of sessions to find outFinish time is not meeting time range
Tip: export list of sessions to find outAttendee is seated twice in the same session
Tip: export list of seats to find out
In case you have done all of these checks and it's still incorrect, please contact support@krowden.com