A batsman has more support than the people below him...like, hmmm, the batsman above him? Chanderpaul has had little support from the middle order. Sarwan has been a gross underperformer until recently, Gayle rarely bats long enough to bat any prolonged period of time with Chanderpaul and the rest don't bare thinking about.
What I am saying is that Chanderpaul's average would not likely be as high as it is now with all the not outs, but it'd still be bloody high had he had competant support below and above him in the batting line up and his runs per innings would likely be far higher too.