Half-Kneeling Position Asymmetry Woes

I have a question that I just can’t seem to find the answer to anywhere. Whenever I try to get into this half-kneeling position for a lunge or stretch such as this, and my right leg is the forward or “up” leg, my pelvis or spine does some sort of rotation thing, that I can’t seem to figure out. I try really hard to make it mimic the left, but my motor control is apparently so lacking that I can’t consistently change it.

The best way I can describe it is that if I were getting into this position in jeans, when the right leg is forward, the outseam of the pants on that side seems to come in towards the front of my leg more than the left outseam does when the left outseam is forward. It’s hard to tell if the right hip is hiking, the femur is rotating, or the pelvis and/or lumbar spine is rotating… or some combination of the three.

I also have a lot of trouble activating my right glute, and I can’t consistently get a good contraction out of it, which essentially eliminates the effectiveness of even the most basic of exercises. I know it’s all connected, because every once in awhile when my brain clicks, it feel right… like the kinetic chain is working as it should.