Appointments on Today Screen w/ Multiple Calendars
 

I'm running the 8900 with the latest version of the OS as listed on the 8900 thread.

For some reason, the calendar app shows I have 3 calendars, 1 for each email address. It only shows appointments for one of those calendars, which is aggravating. I only need one calendar, but I can't edit the default calendar and I can't delete the other calendars.

What's up with that?

Same here. I synced for months with multiple calendars with no duplication.
Now, a sync was done to a different email-calendar, two identical calendars.
I can mask the problem by going to Menu > Select Calendar > And Select just one calendar. On restart, it defaults back to Displaying multiple calendars.

How do I delete a calendar ? or How do I delete them all ?

This is crap. I called TMO and they escalated to RIM. Neither of the reps knew what I was talking about.
1 hr on the phone now with no result