I have to go do Easter activities but you have made enough effort that its only fair I give my capx. (FYI I am using the beta release like I said early you can get the same version I have by downloading the beta at the bottom of the page.)
HERE OF SOME NOTES::
1. You only need the arm pinning to the player not them both pinning to each other.
2. Take the no arm animation and make it the topmost animation for the arms so that it will be the default animation and you won't see the attack animation at the start of the level.
3. I think it may be something with the origin points that is setup in the animation cause you will see in my .capx I was able to just pin and I didn't have to keep updating the position of the arms.