Can't understand this part till now

Rating: 9/10 (19 August 2014)

in wolverine movie Logan loses his power of healing also returns to his natural form his claws returns again to bones not metal . how come in days of future part his claws from metal that he is already lost ?? can't understand this part till now .. but really I liked this movie so much deserves 10/10 if I was understanding this part so anyone can explain that for me I told to myself he did this process again so he gain his powers again I don't know actually what happened ? hope I can understand this and also how in the last scenes in wolverine movie Magneto controlled Logan when he hadn't have any metal in his body also I didn't understand this scenes too so anyone have any recommends for me .