In my limited experience with these register.com names, they can drop eventually.
I picked up ingles.org (English.org in Spanish) in the "snapname" days, something like 8 to 10 months after expiry date.
This was admittedly before the auction days, but I don't think register.com is auctioning off its own names yet (although I might be wrong).
In any case, this keeping of names months and months beyond expiry date is nothing new with register.com. I seem to remember a whole load of their .info names were dropping a year ago which had also exceeded the normal grace period too. (Not RGP period).