In MBTI, the J vs P determines the extroverted function. For introverts, this corresponds with their secondary function, which makes an INTJ NiTeFiSe (due to extroverted judgement) and an INTP TiNeSiFe (due to extroverted perception). In Socionics, the J vs P determines the dominant function, which makes an INTj TiNeSiFe (due to dominant judgement) and an INTp NiTeFiSe (due to dominant perception). Though apparently Socionics function descriptions differ from MBTI function descriptions, so some people do end up with the same type in both systems regardless of this.
EDIT: As this is on the next page, I feel it appropriate to mention that this is in response to the type system confusion and not to the OP.