I don't follow cutting instructions for hst's any more. I do the 8 at a time. It is fast, accurate and no bias edges to fiddle with. Have you tried them that way?
For a 2 1/2" hst you start with 6" squares. Draw a line from corner to corner to make a big x in the block. Sew 1/4" away from the lines. Then you cut the squares in to 4 squares on the center lines then cut the drawn lines. Trim up and instant hst's. It's sweet
