1) If you did the test, which you probably won't, where did you think you'd score, and where did you actually score?
I tried, then ADD'd out. I'm not overly good at official guidelines, but even worse when they involve mathematics, and especially when they're official, involve mathematics and are in English. I've taken a for fun test over at an trans support webpage three times(?), and I've always settled somewhere near the androgynous center, usually on the masculine side but once on the feminine side as well.
2) Do you think this test is complete bullshit like I do? Why or why not?
Yes, because gender isn't tied to stereotypes.
3) If this test is boosh, how can gender be determined?
Assuming "boosh" means "bullshit" - not by tests, that's for certain. I'm not sure. In fact, I visited a nurse working at a clinic treating transsexuals just yesterday, and we spoke of this issue. She told me that when she started working there, she was faced with a patient and had to ask them "Well, how do you know you're X?"
Immediately afterwards, she had thought - how can I be certain I'm Y, then?
If it was as simple as taking a test, life would be easier. But it's not. The experience of gender, especially when mixed together with the experience of gender roles and physical sex as well as the expectations of oneself and the society, is highly individual. For one, gender is strictly what is between your legs. For the other, gender is something far more complex than that. For another, it's some of this, some of that, and some chocolate sauce on top. Gender is a part of who you are, and who you are is a part of how you're build and how you're socialized, how you experience the world, yourself and others.
Takes a crapload more than numbers to figure it out.
4)Am I overthinking this?
Yes.