Does anyone know the answer to this?

I used the first 2 days of my PVAC for IVD’s.
so my PVAC and PVPP (2 days off prior to PVAC) are separated by a gap of 2 days on the PBS calendar.

trying to slide my PVAC in December.

do those PVPP days automatically rejoin my PVAC at some point and slide with my vacation or do they stay separate?

when I put in the vacation slide in PBS it shows 2 different vacation options to slide:
PVPP
PVAC

which just makes me curious how that will all go down.
thank you if you have any thoughts or experience with this