Ordered Remaining showing amount when fulling picked

I have sales order in the system that I have fully picked, packed and shipped. That said, they are showing an amount remaining .

For example:

Item order 1000

Picked 1000

Amount Remaining to Deliver 200

I am not sure why it is doing that. I delievered all 1000. I had enough in stock. I keep leaning towards a UOM issue but I see nothing.

What do you mean by this?

What is your AX version. Please always tag the version.