Are they basing that on the "overall" score? Did they tell you the sub-scores?
Because... we found out (after several rounds of testing including 2 full IQ tests) that... there are rules that determine whether a combined score can even be assigned, and most testers don't follow the rules. If there are significant differences between sub-scores, the sub-scores are still valid but an over-all score cannot be determined because the pattern is "outside the normed range" for validity... i.e. there are so few people that fall into that part of the "curve" that nobody has been able to figure out what that combination of scores means in the "big picture".