Hi Chucks,
This has been added to our known bug list. In the meanwhile, Please upload this zip and extract it. It would replace 5 files in Sellacious. To all calendar fields, you should add "hasCalendar" CSS class. I have added the one for you now.
If you want us to upload this patch for you, Please provide FTP access to server via Direct Message.
Thanks,
Ankit A.
Team Sellacious