A boy and his shoes

Sorry for being temporarily out of touch. Yesterday I came home and attacked some back squats which I have not done for awhile, I started at 235, then went to 270 and notice I was pitching forward and having to fight a bit to stay on my heels? I threw on the Pendlay Do-WIns and knocked out some reps with 300lbs to round out squats and it felt good with those shoes on. Who knows if the problem is the shoes or me? The Addidas certainly have the highest heel I have ever squatted in, but they didn't bother me when I used LBBS, now it seems with HBBS I am struggling. Maybe I have a flaw in my form from switching around so much. I will add some video in each of the shoes next time I squat. I then rounded out the evening with some push press and did no cardio whatsoever, it was a nice young lady's birthday so I had to go out :)