Hello there,

I'm having a resource duplication issue.
We are using the StackModifier with stack size of 50k for all resources. In the storage containers, the stack extends by 10x thanks to ChestStackMultiplier.
Certain VIP Oxide groups have permission to use the QuickSort. With the "loot all" button, they are able transfer larger stack than 50k with one click from the storage to the main inventory and use it further as one stack as it won't split them back to 50k stacks this way unless they split or transfer them manually.

Transfering larger stack than the default inventory 50k to the furnace then causes the SimpleSplitter to duplicate the resources - Furnaces are set to 1.0 stacks multiplier.

The test was run with 60k sulfur ore:
Transferring a 60k stack of sulfur with right click to the furnace will result the splitter to create stacks of 50k - 34k and 3 of the slots 12k leaving you with 120k sulfur - the resources are doubled. Unloading the ChestStackMultiplier plugin and transferring 60k stack with the right click to the furnace splits correctly to 5x 12k.
Setting the furnace stack multiplier higher doesn't solve the problem either. It will only split the stack to correct 12k in all 5 slots, but adds the doubled free 60k to one of the stacks. Click a few times like this and you get tons of free resources.

Here is a video for better demonstration: https://www.youtube.com/watch?v=dke8Wc_h_O8