Help understand all this plz

I am new to all this and took the test but despite getting it multiple times I still don't agree with one specific part,

I have gotten virtuoso every time however when I take a look at what people say about us, it's always about being stoic or less emotions or something, but from my experience of myself I am chaotic with friends and just too confused with social situations. I will explain

When I know someone I will relax around them and do stupid stuff, just because, and am quite chaotic, I also tend to swear quite alot

But when in social situations I can try to be sociable but if someone who is popular or has friends comes up to me I will get suspicious of why and shut down. I will give short practical responses but this Is not my normal for when I am comfortable.

There is also that I am perfectly chatty and well regarded as a leader when it's a situation I understand but otherwise I will let people who know more about the situation take the lead.

And one last thing, what are all these si, ne, fe things and what do they mean?

I've done the test 4 times in the last 2 days and every time I got ISTP-A but my numbers have never been higher then 70% either way and mostly around 65 ish