Created attachment 69527 [details]
Example Databes with two queries - created by design view and by the wizard

Create a database.
Create two tables, one table with a foreignkey for the other.
Link this tables with Tools → Relationships ...
Put some data in both tables.
→ all this is prepared for everybody in the attachment.

Create a query, which should show the content of both tables. In the example this is a query, which should show "Names" and the "Classes" for this Names.
First use "Create Query in Design View ...". The Design View reads the relationships of the table. You could see this in the design.
Execute the Query and count the rows - 6 rows in the example, because there are 6 "Names" in the table "Name".
Now "Use Wizard to Create Query ...". When you choose two tables, the wizard creates a query, which shows all combinations between the tables. Count the rows - 18 in the example, because there are 3 rows in the table "Class" and 6 rows in the table "Name". 3*6=18. 
Have a look at the query. Try to edit it in SQL-View. The query has no condition defined in the WHERE-clause. 

This wizard in unusable for all queries, which should show data of more than one field. It doesn't work in any LO-Version and doesn't work also in OOo 3.3 - could be it never had been worked well.