I'm definitely introverted. Alone and in my head is how I figure out how I will navigate the outside world and people.
It is quite normal for humans to think and organize inside their heads. ENTJs tend not to get as much direct influence from other people as they do with objective thinking. I'm glad you are looking into this subject and sorting things out.
Anyway, I'm not sure which questions were used to differentiate between E/I. But here are a couple I think might have messed things up in terms of T/F:
You value justice higher than mercy
I see this question all the time on personality indicators and it trips me up. I answered "sometimes," but it's probably somewhere between that and "mostly." I think there is some assumption that an F type will choose "mercy." This is not necessarily true for some INFJs (especially Enneagram 1s) that have a strict moral code.
You are loyal to your friends and find it difficult to break long standing relationships regardless of what the other person does
I answered "less often." I cut off people and never turn back even if I inwardly forgive them (which I usually do). Again, due to the moral code mentioned above.
Neither of these questions relate directly to the F/T preference, but answers relate with various personalities and temperaments.