I had that problem with a panel of 6 pictures.....my pattern called for a frame of fabric to be added to each picture. So, I am unhappy with how it isn't exactly square, but, it works anyway. So, my suggestion is for you to make a frame around each of these, then square up the completed items. Then, if the pictures are a little wonky, at least you will have squares, hopefully not too big for what you are trying to make.