To try and explain this clearer, there are distinct differences between a router and a switch.
A switch is effectively there to connect multiple devices on the same network together, think of it like a multi-way extension lead (although in practice it does a lot more than just joining the wires).
A router on the other hand is designed for forwarding traffic between two separate networks, such as between your local network and the internet. You should only have routers at the boundaries of different networks, not in the middle of them as you have here. Similarly, you should not be using a "wireless router" if you already have a router on the network, you should be using an "access point" which does the same thing but does not have any routing functionality.
It also appears as though your CenturyLink PK5001Z is a wireless and wired router so you should only need this and none of the other routers on the network.
Am I correct in thinking this is how your systems are layed out - You have an internet connection coming in from CenturyLink and then two rooms, one with some PCs (Room A) and the other with the server (Room B). You then want wireless connectivity in both rooms?
This is how I suggest you set everything up using the CenturyLink PK5001Z acting as the router and the wireless access point for room A, 2 switches (one in each room) and a wireless access point in room B.
Notice how there is only one router on the entire network and that it is positioned between the internet and your local network.
