@ Nepaliscientist: This is the scenario to my case:

6 years back, applied to few universities. got 2 I-20 from diff. universities. Paid Sevis Fee to one I-20; X Univeristy; (Diff. Sevis ID), Applied Visa to other I-20 ; Y University; (Diff. Sevis ID) and got VISA.

Now graduated from Y university, applied OPT - got accepted.
Applied H1B - Selected on Lottery. and it was PP.
Now, I got a RFE to show the proof of the sevis payment made on that Y University which I never did.
I should have transfer my sevis payment long time back but the old sevis payment now got expired.

So, I made a new payment (called as I-901 fee) also called as SEVIS fee few days back to the current Sevis ID ( Y Univeristy) and my Lawyer is explaining the scenario to the USCIS Dept.

I don't know what would be end result now.

Good Luck to all.
Thanks.