The more zionistic MO crowd will look for a way to keep one day.
And I thought that only Lubavitchers are allowed to do that.
All joking aside, I think the statement that
Chabad [is] confused
is a rather accurate portrayal of the situation regarding how many days to keep in different scenarios.
And the reason is probably
due to the fact that there have been seemingly contradicting indications from the Rebbe on this topic,
I am no expert or בקיא in this הלכה, but I have a סברא that I would like to offer as a possible explanations to the various rulings.
We see that in this specific הלכה, it is dependent not only on the circumstances, but rather on the דעת of the person in question. The unequivocal rulings assume a certain prevailing דעת of a person in such a circumstance, whereas the ones which are individual rulings, rather than by the book (I.e. where soft facts are involved, rather than just a psak that can be seemingly given based on hard facts) give more weight to the individual דעת. (And I would add that even the דעת of being a descendent of the חכם צבי, might affect the ruling).
R' Mendel Futerfas accepted the position of משפיע in Kfar Chabad, on "condition" that he is there אדעתא דרביה. As such, IINM in all his years living in Kfar Chabad he kept two days even when he was there for YT. His grandson does the same to this very day.
And that might answer
@Ergel's question to me regarding the relevance of the reference I pointed to
here. What those quotes show is the (potential) strength of the דעת of a Lubavitcher of where he feels at home (as in the opposite of בנים שגלו מעל שולחן אביהם).
Yet, this דעת can be very individualized, and furthermore could evolve, this might be somewhat akin to the not sleeping in the Sukkah issue, with the explanation the Rebbe bring about מצטער פטור מן הסוכה.