I believe you posted previously, rjx... yes, here (http://club.cdfreaks.com/showthread.php?t=140773)
I'll repost the comment I added here, but please review my entire post again from that thread.
"Actually, when I look at jitter again, that is normal jitter pattern for a y000-t02-00 burn on a 716a. I know what to try: change your range on the graph to +0.5 and -0.5 and your beta reading might flatten out. Right now, it's set so narrow that it will make it look bigger than it is, if I'm reading this right."
Rerun the beta/jitter scan, as your beta result is 'stretched' up and down more because of the shorter interval. Reset the interval in the 'preferences' by changing it to +0.5 and -0.5, which is the standard interval posted on other burn graphs. I have a feeling when you adjust that, your beta result will turn out looking the same as others have had with the same burner.