With the adjustment you made, the cam is probably still on the lash ramps when the lifters and lobes and everything all tighten up. (Which is probably why Lunati said 'OK'.) And which is OK as that is what the last ramps are for... to gently take up the slack in the valvetrain. Because the lash ramps are intentionally slow, changes in lash make for notable changes in duration.
I'd personally leave it there. You're not only change the intake closing, you are reducing the overlap, which has an effect on the low RPM operation (and through out the RPM range for that matter). Advancing the cam and going back to the original lash takes away one of the changes you made.
BTW, I always appreciate info like you reported, so many thanks.
