You can only move the whole section as it works today. If my memory doesn't deceive me there is something called "merge sections".
Regardless, the whole VGPS system will be rewritten, with a plan to release it this year. The new system will look nothing like the old one. With that I wanted to say that this most likely will be possible in the "VGPS2". In fact "sections" won't exist, but another design that should fill the same purpose.