When using the /execute command with the @e part of the command, it will ignore the scoreboard score that is attached to the @e
/execute @e[Particle=1] ~ ~ ~ /particle reddust ~ ~ ~ .1 .3 .1 0 30
yet it acts like it says...
/execute @e ~ ~ ~ /particle reddust ~ ~ ~ .1 .3 .1 0 30
Wrong syntax.
It's