Need help with symbol "start"

I've created a symbol animation to demonstrate continuous flow of balls along a motion path.

The element is called Ellipse and repeats at the end of the timeline via sym.play(0); (see first attachment)

Ellipse is part of a symbol named S1 that is duplicated 3 times with a STOP at time 0.0 and the PLAY staggered by .5 second. (see second attachment)

S1 is part of a symbol named AH. (see third attachment)

I've created a button that with an action that triggers F-IN on the timeline, which produces a fadein sequence. The action is simply: sym.play("F-IN");

My question is: how do I make the AH symbol animation "start" from the first ball when the trigger fires (button is clicked)? When the action is triggered the AH animation is already playing.  I've tried setting  sym.getSymbol("AH").stop(); at creationComplete for the Stage, but the result is that the animation is already playing when the trigger fires, and all four balls are moving in unison (looks like one ball...).

Not sure I'm using all the right terms - kinda new at this. Please let me know what other information I should be providing. I'm using EA CC 2015 on Windows 10.

Thanks