Solved Microsoft Outlook 2010 Calendar lists. Which one is being used?

How can I check which reminder is from which Calendar list?

Somehow, Microsoft Outlook 2010 is using 2 of the 8 Calendars to show the same reminders.

I have since unticked the 2nd Calendar which I don't need, however the reminders from the 2nd Calendar still appear.

I need to Dismiss the 2nd Calendar's reminders, however I'm not sure if I'm Dismissing the 1st or 2nd Calendar's reminders?

Thanks if anyone can help on this mystery.

I have fixed this by manually typing in Calendar list 1 in Calendar data.
Then opening up both Calendar reminders and reading which one has Calendar list 1 in the text field.
Another slow and manual fix for this email client.
Anyone know how other email clients compare to this product?
I know Apple's backup service is on a higher par not comparable with Microsoft.