Central NAT - Different source, same destination with different Ip pool.

hi, i do have central nat problem for pointing same destination with different ip pool

in my case, there is configured different source, same destination with different Ip pool. However the result look no good. 

for example, i tried use 2 machine for test, each assign to use different ip pool for SNAT. But only 1 workstation able to reach the destination with the ip pool, the other one unable reach at all.

i tried swap the sequence the rules, also no luck. 

anyone have the idea? would it because snat session only allow occupied by 1 workstation. sound doesn’t make sense.