If it was indeed the final, wouldn't it say "Version 10.7" or "10.7.0" and not the build?
I know you can click it to reveal the serial number and actual build, so it the build there by default? If so, it needs to be fixed to 10.7 by default.
It does. When you click on 10.7 it reverts to the build number. It has always been like that.