The multi .stl movement issues (fix move all move/mesh command)

Hi everyone,

In my case, I want to move several different plates along minus z direction in different velocities. and used the fix move all move/mesh command. But Have problems. Just one plate moves down.
A. fix move all move/mesh mesh cve1 linear 0. 0. -0.25 & cve2 linear 0. 0. -0.23 & cve3 linear 0. 0. -0.21 & cve4 linear 0. 0. -0.19 & cve5 linear 0. 0. -0.17 & cve6 linear 0. 0. -0.15 & cve7 linear 0. 0. -0.125
B. fix move all move/mesh mesh cve1 linear 0. 0. -0.25
fix move all move/mesh mesh cve2 linear 0. 0. -0.23
fix move all move/mesh mesh cve3 linear 0. 0. -0.21
fix move all move/mesh mesh cve4 linear 0. 0. -0.19
fix move all move/mesh mesh cve5 linear 0. 0. -0.17
fix move all move/mesh mesh cve6 linear 0. 0. -0.15
fix move all move/mesh mesh cve7 linear 0. 0. -0.125
In A way, just the first plate (cve1) moves down and the last plate (cve7)in B way, moves down.

Is there something wrong? Or I should choose another method to do it. any comment is appreciated. thanks

yyu