I'm not missing the point at all, the Mac address is what determines the config file, so it gets told which config file to download, if he is forcing it to download a 10meg config file then thats all it is going to download, because it doesnt matter what the CC does, its going to download that 10meg config file (as long as it still exists).
It wont ever be upgraded because you have forced a 10meg config file, on if either a) you have a 10meg mac that gets upgraded to 20meg or b) you force the 20meg config file (once its available).
If you were saying is he getting 20meg on the 10meg config file, then the answer is no, its there in plain text in the screen shot, the config file is called cm-20480-768.