http://revach.net/article.php?id=2337

Section: Parshas HaShavua   Category: Quick Vort
Parshas Shelach: Menashe and Yosef - The Common Link
 "Livnay Yosef Livnay Menashe". Why was Yosef's name mentioned in conjunction with Menashe and not earlier when mentioning the spy from Shevet Ephraim, his other son?

Daas Zekanim MiBaalai HaTosfos answers, Yosef spoke Lashon HaRa against his brothers, and so did the spy from Shevet Menashe speak Lashon HaRa against Eretz Yisroel. They had something in common. However the spy from Shevet Ephraim was Yehoshua who did not speak against Eretz Yisroel; therefore Yosef's name is not mentioned by his Shevet.