Home Network :: Gigabit Network Only Transferring At 10MB /sec Speeds

Cable modem into cisco-linksys E4200. 2 of the ports going out from the router plug into the wall, where one goes to the master bedroom and one goes to the living room. Once it gets to the wall jack in each of those rooms it goes out to a gigabit switch. Each of those two rooms has a computer and a TV connected, and the living room as a blu-ray also connected to the switch.The third port going out from the E4200 router goes to another gigabit switch, which is connected to a couple more computers in that room.All of the cables are either cat5e or cat6. The long cables running through the wall from the server room to the living room and master bedroom is 24gauge 4pair cat5e, it was run by a general contractor.

When I transfer between any of the computers on the network as it sits I get 11MB/sec. I get that number by clicking more details on the file transfer. In the network tab of task manager it sits pretty consistently at 10%.If I move any of the computers to be connected to the SAME switch (i tested all 3) i can transfer around 60MB/sec.Based on this testing my initial instinct is to say that the cable running between the rooms is limiting the transfer speed. However the cable is cat5e and rated for gigabit. Neither of the runs are anywhere near 300ft long. Plus the consistency of the transfer speeds at 11MB/sec makes me think it's being clearly capped at 100base-T speeds as opposed to just slowing down due to interference of the cable.As a side note there is a place in the router that tells you the speed of each port. For some reason it has one of my ports listed as gigabit and the others listed as 10/100Mbps. The yellow 3 foot cable i have is listing as gigabit, when i swap it with another cable in the router it changes the gigabit port to the one this yellow cable is on, very odd, however regardless of whether the router says its gigabit it only transfers at 11MB/sec anyway.What I'm wondering is what could be causing this limitation besides the two cables running through the wall? Is that the only thing that could be doing it? What is the best way to really test it out? Do I need to buy some kind of network testing device that tests throughput?