As far as I know, they're only paying this bk, but I believe they're paying all lenders.
Some poor guy over there actually investigated the second time I asked about this bk, and found that Prosper hadn't timely filed its proof of claim. Because the borrower was otherwise paying off 100% of her debt through her ch 13, Prosper did the right thing and decided to pay this one off as if it had timely filed a proof of claim.
I encourage all borrowers with undischarged bks to ask Prosper for a status report for lots of reasons. This is one. Prosper could be receiving payments and not applying them to loans. Or, the borrowers could have dismissed their bks, or had them dismissed. Since the only updates I have ever seen on my bks is when they are discharged, I don't think that Prosper is handling them appropriately.
I will be emailing Prosper for updates on several other bankruptcies in the near future.