One trick to remember ladies is tack tack tack. If you stitch a stitch where the points meet they won't move. I hold the two points together and then fold back the tip of the corner so you can see if the points are meeting. If you tack them in place then you should save some frustration with the points.
You can also tack where the bottom of the center fabric meets the other SP block.
Also mine aren't always perfect so some imperfection is expected!! We aren't perfect!!