Right side developing more than the left

[Brendon]

So, with hyper extension of the lumbar and sacrum area... set your isometric contraction of your spinal erectors (squeeze the piss out of them, on purpose, BEFORE you lift and DON'T STOP).

for leaning to one side or another on the ascent, whichever side you're sliding towards... shove that knee out harder. Boom. Centered.

I will try that while squatting next workout thank you. As for the first part of advice I don't understand, could you put it in layman's terms please, possible give a cue?

[David A. Rowe]

So, when you're set up under the bar... you need to squeeze your spinal erectors without poking your ass back. You need to do this before you fully load the spine, and you need to maintain this isometric contraction. Your entire core needs to be engaged, but very specifically your spinal erectors. In order to poke your ass back, the spinal erectors must contract (not being held isometrically) and the rectus abdominals must relax (as well as a few other small muscle groups).

When people are cued "get back in the hips more" they tend to poke their ass back instead of fixing their back angle.

You cue is "squeeze the piss out of your spinal erectors before you load." It's more a step in the checklist as part of an effective, methodical set up every time you squat. Shorten it however you want that works for you.