Actually if anything you should use them the other way around if you want to or think you need to.
In general, pre-wax cleaners all tend to be very gentle, almost non-abrasive products - even more gentle than a swirl remover. The reason for this is because they don't want Joe Sixpack to have any trouble using it, or even using it often if he does. By default, it's "safer" for them to sell a product that is too mild than too strong.
One thing I've liked to suggest in the past sometimes is to buy the Mothers 3 Phase, but substitute a real swirl remover or some other similar "pro" type product for the Step 1.