I'll copy/paste my answer from the other post.
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.
Now when I understand your idea, I can understand that it's not moving all you want, and then I have to say that it's most likely not possible. At least not in a smooth way.
You can add a new section. You will be asked for gc-codes, and can enter it manually. If you name that section the same as an existing one, it will merge automatically (please test with a case where you can afford to lose the data in case it just replaced, but I think it will merge). Otherwise, create with new name and then merge, but that is even more work. Anyway, when you have added the solved cache "again", you can remove it from the old section.
It's abvious that this isn't a very nice workflow for the purpose, but that is the best/only way today I think. But I would expect it to be smoother in "VGPS2".