How to find out what model my GPX is?

Hi Everyone! I purchased a GPX250 advertised as 2007, all other bikes with the same paint scheme advertised on Bike Sales/Trading post etc says it's 2007 but on the RTA registration papers/RTA vehicle check/REVS it states it's 2006 model and that it's a ZZR when it's OBVIOUSLY a GPX! An exact same bike same colour/scheme etc is being sold by Team Moto in Sydney and they have it advertised for 2007...
So how do I know what is the correct model for my bike and should I correct it with the RTA?
So how do I know what is the correct model for my bike and should I correct it with the RTA?