With no other info than this picture, I'd guess you were hitting them too hard, causing the balls to collide and cause weirdness. Just absolutely smashing them will cause odd layouts. You want the balls to accelerate cleanly with as few collisions as possible. Like a smooth acceleration. I could be dead wrong, it's hard to tell from a couple photos but even if you watch the pros they often have no shot after break and use the push out.
Basically you want to find one break that works well then tweak it for consistency from there. Easier said than done though.