Often I get stacks of "1", "3", or other odd number on an item that can be 10 or more stacked deep.
We need to be able to consolidate items in a stack to make space. Currently, when an item is in its proper storage area, there is little you can do short of deleting the zone and manually hauling.
For now, use Stack Merger mod in this thread: https://ludeon.com/forums/index.php?topic=16120.0