Some bugs from the new patch (february 2012)

Hey guys,
I wanna help you for patching some bugs.
Sooo, here are they:
1. I cant use my mutant grenade in HMX. It doesnt exist in my bag if i wanna play with it. I bought it ingame(shop; not the homepage)This bug contains all bags, all weapons( I didnt check the items)
2. I cant change my bags in Excavation. This contains all bags, all weapons( I dindt check items)
3. There is no knockback in HMX. If you shot a mutant , he wouldnt fall back. This contains all wepons, all bags (I dindt check my items)
Thanks for your attention!