Heh, yeah, i do sound like a bit of a broken record with DW2.. but so often I find people following old/out of date tutorials etc..
In this case if you have many combos, I would be tempted to make things a little simpler and jsut have one DataTable/TableAdapter with a Display and Value columns, then the TA can have several related queries:
SELECT Name as Display, ID as Value FROM tblStates
SELECT Name as Display, ID as Value FROM tblProvinces WHERE StateID = @StateID
SELECT Name as Display, ID as Value FROM tblTowns WHERE ProvinceID = @ProvinceID
...
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