reverse question

Ok, I have my shifter clamped in my vice to check all of the lever functions after rebuilding it but I am puzzled on the reverse function. When I try to shift it into reverse the 1-2 lever is moving also, the reverse lever does move back like it should but the 1-2 lever has me concerned, is it supposed to move also. When I move the shifter to the neutral position the reverse lever moves back and forth freely, am I missing something.
Thanks in advance