If the saddle is centered and you are not I also recommend a good fitter who is also a physical therapist who will look at the mobility and asymetry of your hips.

For years I sat sideways on my saddle, more noticeable as my bike fit got better. It was noticed by my bike fitters but they were not qualified to work with my body to remedy the situation. Finally, after much pain in my lower back, hips, knee I went to a PT who did bike fits but tried to figure out what was causing all my pain. Turns out I had a locked SI joint which was rotating up and forward. After he adjusted it I felt centered on my bike. My fitter also said my saddle was too wide for my hips so he put me on the Specialized Ruby. Everything is great until my SI joint goes out on me.

With my last PT besides my SI joint issues, I found out I have a weak, left glute/hip, and an unstable right hip, which rotates backward, and a very stiff lower back all of which I'm now working on.

Not sure how all this translates to riding my bike but working on changing these issues is making a huge difference in the strength in my glutes and legs and my movements when I ski.

My PT says I've probably had the SI joint issues for years, maybe from an injury when I was a kid.