If you sent the payment to correct address, you do not care. Why should the payment be seen on KCC's computer system? Ignore the system. Get the original of the cashed check, and bring it to the AOS interview. That is the only thing you care.
If your bank does not give you the originals, that is too bad. Order a certified copy (signed by the bank) then.
If your bank does not give you the originals, that is too bad. Order a certified copy (signed by the bank) then.