I do not know the answer to your question because the facts you presented are, as you suggest, contradictory and confusing.
Call Capital One and offer to settle the debt in its entirety for $5,000. If the company accepts your spoken offer, ask they put it in writing. Gather $5,000, and send it to Capitol One with a copy of its settlement offer. Then count your lucky stars that you just completed the easiest settlement negotiation with Capitol One in history.
If however, the $5,000 on the Web site and in your credit report is a phantom amount, then dispute the entry in your credit report because it has no basis in reality.
If you cannot reach an acceptable settlement amount with Capitol One, or if you do not have a lump-sum available to pay a settlement immediately, consider hiring a debt settlement company to do the heavy lifting for you. You can get a no-cost quote from a pre-screened debt service provider.
I hope this information helps you Find. Learn & Save.