Spellman, thank you for your thoughtful reply, but my post was not to ask for assistance in diagnosing an issue as much as to report the positive effect of the second probe and release 1.06. You'll notice that when the second probe is disabled, the temperature oscillation of around 2 deg. where as with the second probe, the internal temperature is far more stable.
Jim
Ahh yes, sorry I misread a number of things in your post. To me however it looks like you were dipping a couple of degrees below your set point in the middle of the graph, which seems like it could still be a lot. However if there is a bit of difference in one temp sensor vs the other that would maybe move your line a bit and mean the actual temps was hovering +/- closer to where it should be.