it even changes reconciled amounts back as far as I'm able to check. I thought I had it resolved by resetting the account but even that no longer works.
Do you have the same login for both accounts?
If so:
Did this resolve the issue for you?
"the other always messes up [Edited]"
Perhaps explaining exactly HOW that Account "messes up" would help in coming up with a solution. Do you get some sort of error code, duplicate transactions, missing transaction, or what?
I'd think @Boatnmaniac 's solution might work, but if it didn't about the only other thing to add to his advice is to make sure ALL Chase accounts - including hidden and separate - are deactivated too.
Didn't correct the problem, I guess I'll have to live with it and make manual corrections as needed