I just went back to sportrends website and read their description very carefully. My interpretation is that in both systems if the bullpen or pitcher's PR's are lower then its better. I think whats confusing you is the wording 20 points or 100 points or more, LOWER. Its the word LOWER thats is important. I think you are confusing yourself. Yes I agree sportrends could have used better english. In the final analysis, if the pitcher and bullpen have a lower PR value then they are considered to be better.
Secondly the statement you are referring to which brought on confusion in this thread is when sportrends first posted their original description over a month ago in which there was an error with their writeup. That was already cleared up over a month ago. Now lets move on.