There is a long standing problem with PR values, they change (+/-0.1) depending on the order the upgrade is performed in, therefore if there is a 0.1 difference there is no need to change the table. You can read Admin Kuzz's explanation here: User_blog:Kuzz/The_Pulse_-_Week_4/2015#Performance_ratings and the comments :) One explanation was posted by :208.184.33.66