Waves form the way that they are brushed. You need to make deliberate strokes and make sure that your hands are straight. As a suggestion, you may want to use a military style brush that gives you more control. Handled brushes are cool but if gripped incorrectly it may lose effectiveness.
During the next wolfing campaign, make sure that you implement combing as part of your routine. Combing will space your waves out slightly, will spread hair products evenly and will straighten out your pattern over time.