Oregon Drivers License ????

I work at a bar here in NEVADA. This girl comes in with what looks like a OREGON drivers license but it has a Henderson Nevada adress . She says she is going to UNLV and they put her nevada address on the OREGON license. Then she pulls out a Nevada Drivers Licenes with a completley different Nevada address. WHAT JIVES ...I know when you get a Nevada Drivers Licenes that you have to relinquish your other states license ... Does anyone know ???