about the Umbers and ramsey...
I think the Umbers will turn on Ramsey, they have a plan! they gave him osha and rickon as a sign of good faith, but they wont allow him to kill them.
1. the umber guy refused to swear fielity to the boltons, and you know how important these details/hints are in GOT (a solemn vow is a solemn vow, you know, old gods and so on...)
2. the head of the direwolf was too small to be one of a direwolf, it was a common wolf's head
(of course I might be totally wrong!)