I kinda thought that's what would happen - nothing. I was mostly curious about the 1-1/2 turns they used to be out..... That's a good bit, but as you found, once everything is balanced again at where-ever you start with, turn-wise, it's in sync at idle.
All the air bleeds do is allow a little more air into the mix for that one throat when the throttle plates are at or close to idle. You saw that when they effected the idle speed. They pretty much lose any effectiveness off-idle as the throttle plate edge approaches the transition ports and the bleed becomes less active. At least that's how I read about it.
Thanks for taking the time to play with them and report back!