Are these aliases?

[ExpandUser]

The real table name is: MembersWest

And this is some of the code:

myAdapter.Fill(ds, "Member")

ds.Tables("Member")

But there are no errors while running it.

[#2]

@ExpandUser , with that less on informations no one can guess; could be a view, stored procedure, sysnonum.

You can query it with

select *
from sys.objects
where name = 'Member'