Your lucky....they were President Bush until March or April that year. It happens every time a President is new. The paperwork has to be updated and takes some time. I will retire 30 June 2011 and will have Obama on the certificate for sure...no such luck for me...lol.
We decided that it does take awhile to get the current signature. Plus, you apply to retire several months ahead of the actual date and GWB signed it when the Pentagon sent it to him.
Naps, thank you for your service.