Looking at your code, I'd say several things.
First off, disconnect 11 of the servos, and write a simple routine to test just one, using
very simple movements. Just move the servo back and forth, and don't worry about trying
control the speed. Get that to work first, then, add more servos and speed control.
Secondly, increase the MoveSpeed from delay(15) to something like delay(50). The
standard servo update rate is 20-msec, which is what I suppose the Servo library uses
invisibly, and you're changing the position value faster.
Thirdly, I'm not sure you can connect a servo to pin 1, as that is used by the Arduino
serial port, ie, connected to the USB chip.