Email Enabled Calendar Issues

I have set up several email enabled calendars in SharePoint 2010. The users create meetings in Outlook and invite the SharePoint calendar using the email address set up for the calendar.

We are having some odd issues with recurring meetings. The meetings will show up in the SharePoint calendar when viewing in the browser, but are missing from the SharePoint calendar in Outlook.

If a user cancels one of the meetings in the series, the item shows as cancelled in the SharePoint calendar, but 3 blank calendar items are also created.

Any ideas?