Yep. Same with me. I got 50% I and 50% E on the MBTI test, but it still said I was an extrovert.
I really think I have social anxiety and should probably get that checked out. But other times, I'm sooo opposite of that.
I can be really quiet and I REALLY daydream a lot when I'm like that. Other times, I'll be so loud and outgoing that it's ridiculous. I even talk to strangers on the street, which isn't always a good thing!

But it's okay, haha.
But anyway, I get insanely nervous when I have to speak in a large group of people. I'd rather give a quart of blood or something, Lol! It's so noticeable.
Some people call me shy though. That's not true at all. I'm not shy, it's just that I don't know how to exactly react or say things at the moment so I get all jumbled and not respond too much. But after I get a strong reading of the person, wow, you won't be able to shut me up!