I redid my file and have everything working pretty smoothly, except I ran into one small problem.
Occasionally I have to do a two part order so I have two sets of fields on my order form for Supplier 1 and Supplier 2. When I just enter info into the Supplier 1 fields, the Line Items table assigns an Order ID to the entire order, and a Record ID to each line item. But when I also enter info into the Supplier 2 fields, it assigns the same Order ID, which makes sense, but it also references the same Record ID for each line item as it did in Supplier 1. In other words, if there are 4 line items for Supplier 1, the Record IDs would be 1, 2, 3 and 4, but so are the first four items for Supplier 2.
Do I need to set up an additional Line Items table for Supplier 2, or is there some way to set up a additional relationship between the Line Items table and Orders Table so that the RecordIDs for Supplier 2 appear in the same Line Items table as Supplier 1?
I've attached a screen shot of a rough layout which might explain this more clearly.