INFJ and Fi

Very simply, your Ni and Fe are working in tandem to create a shadow Fi. Because this is a mixture of the two functions, it will sometimes seem to midpoint them. Keep in mind that the cognitive function quiz that most of us are drawing these conclusions from tends to cause INFJs to bias more toward Fi than the old cognitive function quiz which seems to bias toward Ne - because of the way the questions are worded respectively.

This is perfectly normal.

However, it is also possible that someone could be mistyped as an INFJ, and actually be an INFP who over estimates their shadow Ni. Statistically, this is more likely the case.