It leads individuals to think that either:
a) ABCD = ABCd, an idea of which Phaedrus is just one advocate
b) IxxJ = Ixxp and IxxP = Ixxj, which Ganin proposes
These ideas are distracting and what they claim is not always the case. People seem to think that you can just swap the end letter for a lower case version of it if you're Extroverted and that you just switch the lower case letter for its opposite if you're Introverted, and voila, you have your type.
As I've explained countless times, there are discretions to be made between the functions in MBTT and those in socionics, so that just because you're Se leading in MBTT, it does not mean that the same will be the case in socionics. It may well be the case that you are, but it is not a necessary and sufficient condition of socionics Se that you are MBTT Se.