Hello mrez74 - and welcome to the forums. You ask:
Can someone shed some light on when we are going to see one set of SERPs that is consistent all the time? ...When is all of this is going to settle down once and for all?
No one here can possible know when, or even if things will settle down. For all we know, this might even BE the new way Google works (shudder!) I kind of doubt it, and I'm moving forward on that assumption.
But IANAGE (I Am Not A Google Employee) - and I'll bet even those people couldn't say "when" very accurately. Caffeine seems to had defied even the insider's predictions of a timetable.