Backorder Lines vs Delayed Shipment

What is the difference between backorder lines and delayed shipment. When I tried looking into the data I found the sales order appearing in both the lists.

Where are you seeing this? Inquiries, reports? I can see a backorder lines inquiry in sales and marketing, not a delayed shipment.

I don’t think there’s much of a difference. If you look at the data sources, they’re both looking at only open lines with a deliver remainder quantity greater than 0.