Local administrator priviliges

I encountered a strange behavior
When i try to inport a reg file with the local administrator account it
won't prompt me for anything (Which is a good thing) but evetually will fail
to change the Registry due to lack of permissions.
When i try this with a ergular account i get prompt for concent but the Reg
import succeed.

Is this normal? When i try to run the "Runas /showtrustlevels" i get that i
only have Basic user Levels with the Local admin