Hi Ronald,
Say we have a bottle of wine. I can sell parts of it (ie. glasses of wine) or a full bottle. So when I duplicate a glass of wine built from parts of the wine bottle, it takes off too much stock from the wine bottle.
When I void this item that I duplicated (2 x glass of wine for example), it does not return the stock to the wine bottle that it also took too much stock off of.
This is not a problem when I do not duplicate items. However we have been operating like this for some time. The staff is used to duplicating items on bills, when it warrants it. This must explain stock irregularities with items built from parts that were duplicated or even voided?
So I suggest you try the following on your side and see for yourself:
Create a bottle of wine product
Create a glass of wine product and build it from parts (bottle of wine) - 0.25
Ring up a glass of wine duplicate it, send order, go back in and check in product control the amount of stock deducted from the bottle of wine...
Thanks,
Sarah