RASHAB's books and the Rebbe

Reading about the frustrating efforts to retrieve Rashab�s library from Russia I can�t help but think that there is no rational explanation why they can�t get the books. Perhaps there is more to this story. And indeed on the subject of books, wills and libraries, the Rebbe never received the books left to him by Rashab in his will.
Shaul Shimon Deutsch writes in the 2nd volume of his Book on page 265:

The Wedding Presents
As previously mentioned, one of the most heart-breaking events which occurred at the wedding (of the Rebbe) was the theft of a manuscript of the Baal Shem Tov and a manuscript of Reb Schneur Zaiman of Liadi. These manuscripts were in a portfolio together with money, and were in the possession of Rabbi Avraham Schneerson. Rabbi Avraham had intended to give them to his granddaughter and the Rebbe as a wedding present. The theft was never recovered and the young couple never did receive their gift.

There were other presents which the couple was suppose to receive, but unfortunately, did not. In his will, the fifth Lubavitcher Rebbe, the Rebbe RaSHaB, had left some of his seforim (Hebrew books) to his grand-daughters and their husbands. When the Previous Rebbe's oldest daughter, Chana, married Rabbi Schmaryahu Gourary, they received the books allotted to them by the Rebbe RaSHaB. The Tanya was among the seforim received. Today, this priceless Tanya, which had always been used by the Rebbe RaSHaB, belongs to the Previous Rebbe's grandson, Mr. Sholom Ber Gourary. However, when the second daughter of the Previous Rebbe, Chaya Mushka, and the Rebbe got married, they did not get the Seforim allotted to them. According to the Rebbe RaShaB's will, the couple was supposed to receive Beirei Zohar, a Tanya (the Zitomir printing), Toras Chaim, Shaar Emunah Veshaar Hayichud, Pirush Hamilos and Kuntres Ha-Hispalos.

The Rebbe once spoke about this publicly. He said: For a long time, I didn't know at all that such a will existed. When I finally did find out [about the willl], I asked my father-in-law about the seforim I was supposed to receive. But he did not answer me...I didn't have the nerve to ask about it again�As of today, I do not have these seforim.
Why did the Rebbe not get the seforim? Why did the Previous ignore Rebbe�s question, as the Rebbe himself stated?

I posed this question to the Previous Rebbe's grandson. His answer was: It had to do with the friction that had developed between my grandfather [the Previous Rebbe] and uncle [the Rebbe]. My grandfather was not happy with the fact that my uncle was going to college, and not joining him in his tireless efforts on behalf of Soviet Jewry and other communal activities, with which my grandfather was involved. My grandmother, [Rebbetzin Nechama Dina] was the one who continuously kept defending him.

Whether or not the readers are willing to accept this reasoning, the fact remains that the Rebbe did not receive the seforim allotted to him by the Rebbe RaShaB. The Rebbe would also mention at a public gathering that: "Although it is customary in many circles for a Choson to receive a Shas (a set of Talmud folios), [however], I did not get it...