Very bad fork (The Elder Scrolls 5: Skyrim)

Quests of the Companions, after the formation of my character is a harbinger, took the quest from Vilkas. He was not called a Redemption not a Cure, but its essence was that Vilkas agreed with the opinion of Codeca and decided to cure lycanthropy. In order to do this, he asks the player to escort him to the tomb of Ysgramor with the witch head.
However, during rapid movement or even a regular exit Whiterun quest disappears from the job list, and the Vilkas moved to Jorvas.
Some time I do not particularly notice it - well, lost the quest, and disappeared. But the trouble is that now I can not take a single satellite. Even Vilkas when such a request says that I have someone there, Lal. I hate this fork.
What to do and how to be?