Adobe broke that interface in a recent update. You will see it is broken in the standard dreamweaver recordset as well. I looked into it and it is a bug in the tree control they use for that interface, so it can't be fixed easily. I'd have to rewrite that entire tree control and all of the logic. The best solution is to use the webassit Querybuilder visual query interface for that now. It does the same thing in writing your sql and has more options.