baldOUfan, I sometimes cut myself in the same place. That area can be tricky, especially doing it blind.
Like greatnessinc, my cuts are almost always due to a new blade. I switched razors today and got two small cuts on the rear of my head. It was probably my fault for going a little too fast. All you can really do is hope they heal fast, I guess.
I now take a little extra time on the tough spots. Timewise it's probably 50/50 on 80% of my head and the 20% that is tricky.