Thanks cfstr1.
I ended up calling the Chase Recovery Dept. to inquire about the latest status of my account. The charge off reversal stands, but the account is permanently closed (emphasized by Chase).
On the bright side, the balance due is now half the original amount, and Chase will not report it past due. Now, I'm hoping they update the credit bureaus soon.

Thanks so much everyone for all your help so far. I would probably have exacerbated my credit problem without this forum's help. This baddie looks like it's going to be taken care of, and I just have one left. I'm trying my best to be patient and wait to check my new Fico scores in a few weeks.
Thanks again!