I have a closed, paid student loan account on Equifax that until recently was reporting as below:

However, after a recent dispute it has been updated so that the payment history for July and September show "CA." (As you can see, prior to that it had been reported as a "CA" in September of 2005 and then as "*" from there forward. June and August are reported as "*".)
This has caused my Equifax FICO to tank because it looks like a more recent missed payment/collection account than it really is.
I have sent a dispute letter to Equifax disputing the "CA" notation for July and September. If this dispute is unsuccessful, what would my next steps be? Also, what is going on here that would cause this account to be updated as a "CA" for these recent months?
Also, based on how this account is reporting when could I expect it to age off of my Equifax report? Is it 7 years from the reported "Date of First Delinquency" (4/2003)?
