Create Multiple DataRelations between three tables in DataSet (Not Strongly Typed)

Question

I am familiar with programmatically loading a dataset with two tables and adding a parent child relationship between them.

When I tried adding a third table and a second relationship in the same DataSet, I get unexpected results.

I what I am trying to do possible? If so, is there an example? (I have googled but no good results)

Thanks in advance for any pointers.