I don't know if the numbers cited are accurate but they a bit seem overstated, this is pretty much SOP. During my time, I and others spent time doing TDY in locations where we were officially withdrawing troops.
I think the official numbers are probably based on PCS status and not the actual numbers of bodies as the unit commanders react to short term (less than 30-120 day) conditions on the ground....never seemed to a problem but some folks can always find something to knock the military for...