P4021 orders do not decrease Qty available for some items but it does for others
We have a simple version of S&D that does not show planned orders and Forecast. We are not using this S&D for planning. We only use it to see what we have right now and what we can sell right now. For some items, the orders are reducing the qty available. But some other items do not reduce qty available.
From what I can see, both items are set up exactly the same and all orders are at the same status. Is there something I should be looking for that I am overlooking?
I've read over Doc 632541.1 and I can not find anything in there to help me solve this mystery.