Single player can spawn any vehicle no cost

I have checked everything I can; the mod config, permissions, and I even spawned in as a standard player (non admin) and I cant spawn cost free; but I have a player that can.

How can I figure out what is happening here.  The player in question is honest and told me about this.

What can I do??

I don't know what you're talking about. 
When you buy the license, you can spawn the vehicle for free