Kind of strange that it "moved" since the last measurement.
Don't you just love working out the little bugs?????
Do you have a scanner Ken?
If so, one of the things to check is your total advance curve on the timing. I also see where TPiS has been offering a dumbed down ESC module to help eliminate the computer retarding the timing when it hears false noises that are not from spark knock,,,ie., roller rockers, headers, tight motor mounts, etc.
You need to check that out. I am going to do that trick on the 90 vette. I am positive from time to time it hears the throw out bearing/input shaft bouncing around without the dual mass flywheel and kicks the timing back when I am launching the car (does it onces in a blue moon).