[JPs]

this may be helpful till more knowledgeable members show up.

But it sounds like you 'roundhouse' from the square stance. Bending the plane to the right (for a lefty) sounds like your plane line is bending because your hip is in the way. So you have to go around it to get to the ball. Opening your stance seems to allow you more room (hips are cleared) to get your shoulder down plane without the bending. Why it works for you, I don't know. But if the ball goes where you want it to... Just keep doing it.

Hopefully someone with more smarts will show up and give a definitive answer.

JP