You seem to be confusing a "Table" with a "Table Occurrence". They are distinctly different things.
In the relationship graph, any table may have multiple occurrences. What shows in the diagram are Occurrences...not the table itself.
In the table list (Tables tab) you'll see the table name to the left, then to the right you'll see the various names of occurrences of that table.
Read up in the on-board help regarding table occurrences...they have nothing to do with results or lookups...they are a way to fine-tune and control functionality of the database.
OK that's excellent. Many thanks indeed for you help. Got more reading to do but it begins to make more sense.