I noticed groupings usually don't repeat from one drawing to the next, and the PB number usually does not come from the same grouping set of numbers, ie  if you pick 22 and 27, that's from the 20's group, do not pick a PB from the 20's group.

Right now I blended two systems into one, and I'm really screwed up now.  One theory I have says a grouping from the 20's will not happen on 7/12, and along with that a number from the 50's will not hit, and going out on a limb, another system said nothing from the teen's will hit (10-19).   Yet another system says a grouping from the 20's may hit, and one number from the teen's will hit, and a grouping from the 40's will not hit.

Hell, I have one theory that totally contradicts another theory, I'm so lost I may never be found.