Hello @wz-lieberman,

Your inventory adjustments would show duplicated lines but they aren't necessarily duplicating the amounts of your inventories. Let me provide some details and get you familiarized the ins and outs of inventory adjustments.

When you create an inventory adjustment, the affected accounts are your Inventory Asset and Inventory Shrinkage. In the Transaction Journal of your inventory adjustment, it'll show two sets of the adjustment.

The adjustment wherein there are no amounts denotes the change in your inventory quantity. While the other denotes the change in the value of your inventory.

I've attached an article for more information about inventory.

Feel free to leave a comment below if you have any other concerns.