There is always a possibility that this can happen when you dispute the balance for any trade line.
I have been in a situation where my balance was high on a credit account and I paid it off. I really wanted the zero balance to reflect quickly and thought about disputing the balance. After some research I found out that if you do this you will be risking losing the account completely. Which is why it shouldn't be done if you want that account on your credit file. Now, if it was an account with several negatives then it might be a blessing in disguise.
More than likely the trade line will report back onto your credit files when Cap 1 normally updates with the bureaus.
Hope this helps!
IN GOD WE TRUST ~ ALL OTHERS MUST DOCUMENT!