Hi Grant,
I have an issue in my master scene, it's not happening in a fresh scene so it's perhaps not a RPmanager bug as such.
When I try to render locally it submits to backbuner, this is the same if I do it from the Max render dialogue or from RPmanager "Local Render".
On testing I've merged the RPManager data into a fresh scene (from my Master scene) and the same thing happens, local renders go to network rendering. So it seems it is caused by something within the RPManager data.
Cheers
Dan