DIRECT STUDENT LOAN

I am trying to help my neighbor figure out what is going on with her student loans.
A bit of history she had defaulted a few years back and very recently completed a loan rehab program. Right before compleation of the program she was offered the chance to participate in the William D Ford Program (what ever that is) She filled out all the paperwork and sent it back. She selected the Income Contingent Repayment plan.
Soon after that she is sent notice that Sallie Mae is the new lender (before finishing rehab it was GRC) and that her new payments would
be $50.08 instead of the $58.00 she was sending to GRC. The new payments were to begin Feb 24, 2009. (she even has a payment coupon book)
She called GRC to see if she still had to pay them in January and was told that she did not.
Then In January she receives some paperwork from Direct Loans (the same paperwork she had just submitted to GRC) She contacted direct loans and told them she had already sent the info to GRC Direct Loans told her that she would need to send the paperwork to them anyways.
Before she could even send it in she gets another letter from direct loans confirming that she has elected to participate in the income contingent repayment program and that her payments would be $0.00 and that there is $0.00 owed.
She calls direct loans to verify who and what she is supposed to pay.
She is told that until consolidation is finalized to pay sallie mae the $50.08. When consolidation is finalized her payments would go to $0.00.
Thing is every income contingent calculator she and I have been too her payment does not come out to $0.00 it comes out to anywhere between $25 and $140.
Can some one shed some light on the real deal here?
Thanks.