I don't think she can. It's quite clear with most affinity credit card programs, including the CO Chase one, that miles for purchases on all cards on the account go to the primary cardholder's account, and not to each cardholder individually. So, what you're trying to do is not to get an error corrected, but get a special waiver of the rules. I don't think it's gonna happen. I think the only option is to pay for the points transfer.

Also, what does she need the 50K for? If it's for 2 domestic tickets, consider redeeming one ticket from each OnePass account. That might make the amount of points that need to be transferred less.

I'm sorry to hear about the situation. I know it must be frustrating and disappointing, but I really don't see her having a remedy outside the normal rules in this case.