Hi Joel McIntyre,
Thanks for your interest in Syncfusion Products.
This seems to be the issue in the MonthControlAdv. We request you to post new incident in Direct Trac. This would be very much helpful for us to provide you the better solution.
Please use the following link for posting the incident.
http://www.syncfusion.com/support/directtracLet us know if you need any other details.
Regards,
Jeraldes J