Here is a diagram of how our house is wired (it's as efficient as it can be): Modem -> Airport Extreme (Basement) -> Hardwired Ethernet -> Gigabit Switch (Upstairs) -> to Airport Express A (setup to extend the network) to another Gigabit Switch (Media Room) -> Airport Express B (having problems) I am having two issues. When I try to connect Airport Express B to extend the network, it crashes the entire system, and I have to disconnect it and restart everything. What am I doing wrong here? Should it be setup as join a network instead? Second, when I open Airport Utility, almost every device in the house is connecting to the Airport Extreme despite it being farther away than Airport Express A and having a much weaker signal. How can I get the devices, to connect to the nearest Airport Express. Thank you!