I pull vehicles over for one of three reasons:
1...traffic violation
2...matches the description of a vehicle we or another agency is looking for, or has a warrant attached to the plate
3...investigative reasons...IE "why is that car parked infront of a closed jewelry store at night, facing forward as if to make a quick getaway?"
The vast majority of stops I make are for #1. Not every one I stop gets a citation. I very, very rarely write citations for all the violations I could.
If I issue two citations, then you probably could have been issued 4-5.
If I issue 4-5 citations, then you probably had traffic warrants out for your arrest from another venue and I didnt arrest you and tow your car, or, you just couldnt keep your mouth shut and talked your way into all the citations I could issue you.
Where your car is registered has nothing to do with why I stopped you.
Nick