I think that there is no "right" or "wrong" way here, it comes down to preferences.
I myself fly with ailerons and elevator on the right stick, and rudder and spoilers on the left stick.
But on the other hand I also know a lot of people, who set up their controls like you do.

But as in everything else, you will find people who tell you thet their way is the "right" one.

This controversy is probably as old as radio controlled flight itself.

Michael