A couple of questions. Why were you running cash through your Chase checking account? Why not just pay your CC bill as a "pull" from your CU?
Did you ever "bounce" payments with Chase (You mention that the checking account may not have had any balance)?
Seems like there must be more to the story. If not, then write a very nice letter to the office of the President requesting information. Do not be demanding. Tell them that you never bounced a check, you have run $XXX through your credit card in the last year, with no late payments etc.