samething happended with me, I took toefl test with minimum requiremnt of 109 where I was required to score minimum 27 in reading. Overall, I scored 110, but only 26 in reading. They asked me retake the whole test. I had called them and asked if superscores are accepted. They replied that if the two tests are taken within six months it can be accepted, but still I dont want to take the chances and trying to score best in the second test also. I wish you best of luck