Chris, I see you have a ticket related to this and Zach has evaluated it and says your calendar files on the server don't have the data for just a few appointments. We are pushing to your clients what the server has.
It seems the client you are using is the potential cause of the few calendar appointments without titles. Maybe Zach can help you with that. I am not familiar with TB Sync but if its anything like Thunderbird itself, it can often not follow RFC's at times..
Again, not a resync issue and for other customers, we have no tickets that are actually resync related.