I love the Exploding Star block and I don't believe you were intended to match the resulting points. Just square up the blocks and put them together any way you like. Put sashing between them or as yadroc did they are amazing. I'm using them on 2.5" squares to start and am going to use them to make a baby quilt. Take a look at the block again and see if you could just cut off those offending points as they don't affect the block at all.