My cobra insurance was cancelled but payment already processed

I paid $1500 to cover my COBRA insurance through Aug 31st, when it will expire. ADP services processed my payment but also show they cancelled my coverage effective 5/31/10. Insurance payments have been made to my medical providers since that time. Does this cancellation mean I will have to pay back the insurance company for claims? Also, since they processed my payment will this re-instate my coverage?

You need to call the insurance provider and get them to straighten it out completely. It sounds like the check processing info hasn't caught up with the rest but no matter what anybody tells you here, it will still have to be corrected with the insurance company.