Ephraim and Menashe's Blessings: The Merged Identity Between Yaakov and Yosef

Rabbi Zweig opens with structural questions about Parshas Vayechi. The parsha contains four sections: Yaakov asking Yosef to bury him in Eretz Yisrael, Yosef's visit to receive blessings for his children, the blessings to all the tribes, and Yaakov's death and burial. Yet the organization seems illogical. When Yaakov explains why he didn't bury Rochel in Maaras Hamachpeilah—that it was "al pi hadibbur" (by divine command)—this explanation appears in section two (the blessing of Ephraim and Menashe) rather than in section one where Yaakov asks Yosef to bury him. Similarly, the gift of Shechem echad to Yosef appears in section two rather than section one. Why address Yosef's potential resentment when Yosef is asking for something, rather than when Yaakov is asking Yosef for the favor of burial? Moreover, Rashi (רש"י) states that Yaakov gave Yosef Shechem as reward for burying him—but this contradicts the concept of "chesed (חסד) shel emes" (kindness of truth), which means kindness with no expectation of reward. If Yosef received payment, how was this chesed shel emes? Additionally, Yaakov's favoring of Yosef seems to repeat the very mistake that caused the brothers' jealousy and led to the descent to Egypt—the Gemara (גמרא) in Shabbos (שבת) teaches that one should never favor one child over others, since Yaakov's gift of the ketonet pasim led to the entire Egyptian exile. Yet here Yaakov gives Yosef additional land and elevates Ephraim and Menashe to tribal status, seemingly violating this principle. How do we reconcile this with the halachic concept of the firstborn receiving a double portion (pi shnayim), which itself appears to contradict equal treatment?