Did you link his results to your tree using the following process:
1. Go to the DNA tab.
2. At the top right, click on "View Another Test" and select his test.
3. At the top right, click on "Settings".
4. In the second section under "General Information", labelled "Tree Link", choose your tree, enter his name and then click on "Link DNA results".
If that is the way you did it then maybe it just takes a while for the results to update (it was a long time ago that I did it, so I can't remember if I had to wait or not).