Yes, but rep told me I had until September to close card and still receive my annual fee credit in full.
Why were my Amex MR points from a different business and new login merged with my personal account?
None of that makes a diff if the MR accounts are linked.
Why was it linked in the first place though?
Same name and SSN?
Yes
There you go. MR is one account per person, not per card/biz
Rep agreed to make separate account
Thanks for the info, I personally have never needed it, but I may one day...
Paid off a CC to 0 balance. Than I got charged with some interest charge. Does this make sense?
Were you carry a balance for the prior months? If so, yes.