My honest opinion, I think there are great chiropractors. I also think there are quacks.
I
'm not too trusting of chiropractors that try to gain your business by free exams and x-rays. They are way too vested in...umm...well...bending the truth a little. I had such a chiropractor once who diagnosed me with major scoliosis. I ran away from that one.
As it turns out, I Do have mild scoliosis but never had an x-ray that looked like what that original guy did. He made my spine look like an upside question mark.
I had been seeing a new chiropractor since February and tried to remedy a very similar problem that your chiropractor diagnosed you with. In my case--I have had this same problem twice before and use PT to fix it. I tried this time to go without it and finally gave up last week and went to get my prescription. After 2 treatments, I am making headway. But I am still not fully uncrooked just yet. (I loved how the PT on my first visit said HOLY CRAP!

)
Anyway--I want to be athletic and my problems are inhibiting me. My chiropractic does some kind of therapeutic massages--I had them working on my problem areas. But it just wasn't enough.
So--if your issues aren't causing too much issues, don't worry about it. But keep in mind that those kind of issues can be real and sometimes, chiropractic adjustments just aren't enough. I thought I was making real progress, and some how--things began to get worse as certain muscles of mine are just stuck tight and not letting go. Chiropractic didn't cause it, but it just wasn't fixing it. My right side is still weaker than my left.
I had neck adjustments the worst. I really don't like them, but sometimes I do have an issue where it is needed. Thankfully--my neck seems to be doing well. If I can get that hip and glute to behave, I'd be golden.
Just thought I'd chime in--because when I read your post...I was excited to see that someone shared similar issues with crookedness.