Go to the war chiefs/heroes call board. In SW or Org.
The board only displays a limited number of breadcrumb quests. Keep accepting breadcrumb quests from the board until the one for MoP rolls up.
Accept it and then delete the other breadcrumbs.
Are you doing MoP in chromie time (level 10-50 with mob scaling) or regular time (10-35 with no mob scaling)