That shouldn't make a difference. It still only stores one value in that field.it's how they are set up I think because there is a drop down for choosing the staff names and that is how it lists it?? Does that make sense?
Why do you have this?
[Query2 2011].[Workshop Data].[Staff Member].Value
Why the need for the "Value"? How is this field formatted?
I think the best thing you may be able to do is to post the first few rows of data from your Staff Name table and two queries, so I can see if your SQL code makes sense, based on the data.