FS70 starts at full revs, also excessive vibration?

I recently purchased an FS70RC-E. When starting the unit with the choke on, it fires up at full revs with the head spinning full speed, it only then returns to idle when you press on the throttle and the choke returns to the run position. Also, I've noticed excessive vibration to the point where the unit bounces around if left on the ground (I've owned a few trimmers in the past and none vibrated this much). Has anyone else had similar experiences with the FS70 or is mine faulty?