Hello,
if you only have stacks of 5 woods, then this is a bug in combination with OgreStack.

You can easily fix it yourself at the moment:

• Start the game with activated OgreStack
  
• Options > Mod Options > OgreStack > Scroll down to "(Advanced) Individual Item Targeting".
  
• Open the file Overrids.xml under the given path
  
• Add the following item defNames between <IndividualItemOverrides> and </IndividualItemOverrides> (you can adjust the stackLimit as you like):
  
  <item defName="DankPyon_RawWood" stackLimit="100" />
  <item defName="DankPyon_RawDarkWood" stackLimit="100" />
  <item defName="DankPyon_DarkWoodLog" stackLimit="100" />
  <item defName="DankPyon_AncientWoodLog" stackLimit="100" />
  <item defName="DankPyon_ElvenWoodLog" stackLimit="100" />
  <item defName="WoodLog" stackLimit="100" />
  
  
• Restart the game
  
• Profit

❗ If you want to increase the number of timber per stack, you have to increase the stackLimit for WoodLog

Please note that this stuff is case sensitive.