It's not really clear to me exactly what point you're making here. The Dewitte paper is basically saying the OLR correlates rather well with the temperature increase.
Are you saying we should see an inverse proportionality?
You're asking questions he doesn't have the answers to. It's clear by now that he doesn't actually understand any of the stuff he copies from somewhere else. Like most climate "skeptics" he's basically following a recipe, and he hopes to throw enough sciencey-sounding stuff at you that you'll a) not be able to respond to it all or b) believe that he's actually an authority on the matter.