Factor V Leiden mutation?

My name is Amjad Hamed and I had DVT in April 2009 in my Right Calf, since my hospital Doctor put me on 8mg warfarin. For 6 month after that on my regular visit to him he asked me to do the Test which is I attached and after the result he decided to put me again on warfarin For life nevertheless I consulted some doctors and they said you should not be on warfarin. Because you Prothrombin is normal (345) and regardless the Factor V Leiden (67,200) Mutation does not mean you should by on warfarin. I appreciate if you tell me weather I have to stay on warfarin or not.