I suffer from occasional flyaway rounds with my 9's, i know when it happens something didn't feel quite right. Could be at the end of the range visit, sometimes my eyes just arent working as well as i'd want and being at a small indoor range can get a little dry, and sometimes its lack of focus.
I tend to apply stick on targets (that show the hits) to the targets supplied by the range so i can see my hits, but yes i do at times find myself watching for hits over keeping on the sight. Kinda of like a bad golf swing, and i'm watching the ball before the club swings all the way around.

I do try to finish a range trip by getting a good mag's worth of shot placement, so i dont leave wondering what went wrong that day. And I fully admit there is always room for improvement.