Replying to Mounting Line Blends

I got brand new 2012 Blends and the recommended mounting spot is -4, that means the recommended line on the ski is -4 from true center, right? I ski 50% park and 50% powder/all mountain. I picked them up mounted to the recommended line and they look too far back for park (switch skiing and rails). I brought them in to go +2 from the rec line which is -2 from true center. I brought them back last night and he left me a voicemail about it not being a good idea