Supply Glitches?

[MJAnderson]

I'm playing with HPP but I don't think that can do anything to mod how supplies are calculated so I assumed this is base game issues. Every once in a while my supply usage will spike to a massive number. I'm playing as Italy and am sitting on top of something like 85k of supplies. I got a popup saying that my supplies are in shortage and would run out within 30 days. When I hover over the tool tip it says that I will use 8242 supplies today. The next day it will drop back down to about 620 used. Any idea what is causing that? I am operating in enemy territory but only with 5 divisions...

 

[Kovax]

Several things can cause such swings:

Strategically redeploying draws an increased supply and fuel cost, and they arrive without any supply, so it takes time for the system to adjust.
Moving laterally to the source of supply can cause everything already in transit to be sent back to the capital, and then have to make its way again.
Rebasing ships or planes can cause large supply shifts. Deploying new units can do likewise.
Taking an enemy's capital captures their stockpiles, so you get a few weeks of insane swings between surplus and shortage until it sorts itself out.

Smile, it could be worse. I've had one or two German units sitting for a week or more without supply on both the French and Polish borders, BEFORE "Danzig". The supply system in this game needs serious help.