Well, I can answer this question myself and maybe if someone else has runs into the same problem this entry might help give some ideas of what to look for.
1. In the orderdeails table, the checkmark for autoincrimenting the OrderID column must be set. I have noticed that sometimes when editing/adding to the table this checkmark has sometimes unchecked itself.
2. When selecting the orderdetails table, the Order ID selected should be DetailOrderID. The instructions and examples show this.
Order ID: DetailOrderID