Think I fixed the shooting low left issue. Yes I know it's the shooter not the gun. Took my favorite pistol, Beretta PX4 Storm 9mm to the range with me this morning.
I fired about 100 rounds thorough the PX4 double action. This required me to fire slowly and pay close attention to trigger pull. Then I fired the PX4; one double action and one single action round. Did this for another 100 rounds. Then I ran about 50 rounds through the shield plus, SO much better. Is the problem completely solved: no. Some more practice next weekend and I think I will have it under control. Knuckle of my trigger finger is a bit sore lol.
Not saying this will work for everyone, but it really helped me concentrate on fundamentals.