Low and Left

After another 100 rounds at the range today I must say... I am quite frustrated !!

I keep going low and to the left. I am using the straight heinie sights that came on my 24/7 pro 40cal.

after some time of this, I decided to try the bullseye behind the bottom dot. This was much more accurate and my final 2 clips were my best groupings. I know this is not how to use those sights but what the heck! :???: :???:

any suggestions? much thanks