I just went through some more issue, when I switched to wireless N. The router is supposed to run all three possible network security protocols simultaneously, but it does not like it much. What it does, is use a lower range antenna which affects the newer "N" speed improvements.
This caused me to upgrade my modems, and put some on ethernet. I have nine on the network in a single family home......LOL....
And I thought we were bad!
(I will sheepishly admit that I had forgotten we have an X-Box on ours, also.)