I believe it has to do with the placement of your HST units, rather than your cutting. The three that are out of kilter need to be swapped around with each other and you will see that you did it just perfect.
I see that, but the lower right corner would still be wrong. I arranged and rearranged them for half an hour. I had those 2 lined up when I laid out the block Must have mixed them up when I was sewing :( I guess I should have just made another square that would have been right! lol :)