This may sound a little strange but IQ test measure only what they are designed to measure. My IQ is somewhere between 120 and 130. The 120 is off my ACT test in high school and the 130 was taking an online test. Do I believe either of these numbers - no. The reason is I have the ability to think creatively and that's nearly impossibly to measure accurately with any test. On the other side, I have my weaknesses. I stink at artistic activities and believe it or not, I am also weak in english though I may have improved over the years.
It's very possible to have somebody who others consider a genius test poorly on the test. On the other hand, I have been around people where supposedly bright that I wouldn't trust with basic tasks. In my profession, we often used the line, those who can, do. Those who can't, teach. If you are able to do your job well, you are a genius in your profession and you shouldn't worry about a test and especially an online test says about you.