My BOM has items that are shown but then the quantity is a dash. However lower down in the BOM (different number), the exact same item appears but with the quantity. If I delete the row, not only do I have a missing item number, but it changes the quantity in the lower row. If I click the arrows of the bom so that I get the part preview, the ghost line shows no part. Anyone have any idea what is going on? As a last note, combine like items does not cure this. I dont even think it was "available", like its not recognizing it. This is with bolts, nuts and washers from the toolbox.