You may notice that your Remaining area in your Inventory Replenishments page shows Sellable Refunds placed back in your inventory for a Refund, when you previously marked that Refund as Unsellable.
This is because for your Inventory, we use the Amazon disposition for the item to subtract the refund. That way, when the removal order is done where you disagree with the Amazon disposition, the inventory will then be removed again with the completion of the removal order. The removal order will offset the addition of the Sellable Refund to ensure the FIFO order of your remaining replenishments are most accurate.
You can view the Amazon-selected disposition of the Refund by clicking on the order ID on the Refunds page and viewing the "Disposition Status" area. Items with an Unknown disposition are deemed Unsellable.