You're way ahead on me on how this actually works. I simply gave them the certificates that were all over a year old, filled out the forms (in triplicate), and 3 weeks later they showed up in my account as tradeable securities. They did not even bring up the two-year thing you describe.
It might just how you explained it to the customer service representative. I just told them I had certificates that were no longer restricted, wanted to remove the legend, and deposit them in my new account. I'll check and see if I have any of my old E-Mails with them documenting this. If I find anything, I'll get back to you offline.
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