When using the Dank mod, in the Dank 1-7, if you sort items, it will add one item to each item that is in the dank, therefore duplicating it.

can you please check which mod version of dank is installed and which specific dank is duplicating happening with.

not sure it does this for me it takes that one from the stack pulled

so 64 is 63 when I pull it out if there are 64 of a block in the dank null