What happens to the buffer days? M/U? Reconstruction?

The Reconstruction verbage makes it sound like if I added 3 days to my vacation...I will have to tell scheduling where to put 3 days to make up for the 3 I added. Now THAT is a confusing sentence.

You will then be scheduled for a number of R-days equal to the number of monthly scheduled R-days, less the total number of vacation days."

It says total number of vacation DAYS...is that vacation days originally awarded or total I knocked out after extend/slide/buffer?