It depends on what holds you have (if any). The total seat count would be the ticket count + seat unsold count. Also, sometimes it displays the sum of something as the total. As in, the SUM(Ticket Count) is the same as [Total Ticket Count].
I'd start there and then start adding hold codes. Maybe someone has added some that you didn't know about.
Here is an example:
One more thing, remember that the data in Analytics is one day old (unless you are self-hosted and have it set to update more often). In other words, any changes you made today will not show up until tomorrow.