From the pitcher's perspective, my lefty son sometimes misses to the left of the plate. It's not by much, and it's in the strike zone. He can recover, but typically this is where he misses.
Without video to show you, what, if anything, can you conclude from this? I usually tell him to stay closed meaning lead more with the hip like in the Hershiser Drill because I assume he's flying open a bit causing him to miss to his left? Is this a correct assumption? I don't want to give him the wrong advice.