TableAdapter approach

I'm starting an application using a TableAdapter instead of direct sql
calls.
In my table adapter there's already an stored procedure that returns
columns a, b and c.
Now, I added another query, but now I need it to return columns b, c,
d, and f.
As you can see, columns does not match.

When I close the table adapter wizard for adding the query, it warns
me, or well, it informs me about this missmatch and tells me to check
it if that's the correct desire.

I thought this would throw an error, but it doesn't. I have a method
that return a different set of columns from those listed in the
TableAdapter.
Is this approach "correct" ?
If no, what's the proper way to do this ?

Thanks in advance,Any idea ?