Hello, I just purchase a new Phantom 2 with Zenmuse gimble. I open the box and began to assemble the quad copter. I quickly ran into a snag, and the motor's tread direction didn't match the instruction. Instructions read "gray - clockwise" and black "anti-clockwise." Additionally, the icons on the copter reinforce the instructions. When attempting to screw the propeller one, the do not tighten, and must be screwed the opposite way. Has anybody had experience with this? Did I just get a bum unit. My concern is testing the quad-copter, and having the propellors fly off. Any advice or thoughts?