Exactly it ^ heres the bulliten - easy to check but sounds the same.
http://www.the370z.com/images/servic.../NTB09-024.pdf
South Point looked after me no worries, I was more pissed as I booked at RR as it was 20 from my work and took time from work to visit them for appointment, they said 'sure we can take care of it on warranty' only to say "sorry we will charge you for that cause you did not buy from us" not the first time I had crap customer service from them, but they are close etc.
So I travelled the 20 miles to SP, service tech who greeted me (with out appointment) got right on it and was totally cool.
They all represent the brand, they should be able to claw back tech hours from Nissan regardless who actually did teh work initially, if I am in New Mexico and my Z has an issue I am not trailering my vehicle back to South Point and Nissan USA would not expect me to do so.
It just seemed a totally unresonable way of dealing with my issue.