I don't believe that your problem is that you are a left-eye-dominant righthander. If you need to adjust the sights, do it.

If you've lined up the sights, you've lined up the sights. Doesn't natter which eye you did it with.

How you hold the pistol affects how the pistol recoils. So what? Keep it consistent.

Sounds like you haven't really learned yet what adjustable sights are for. Get your groups small by sight picture and trigger control, and then adjust them onto the target.

By the way, I am left-eyed and right-handed.