Linksys Wireless Router :: EA2700 - Getting Poor Download Speed?

I have tried all the speed test sites and tried downloads with and without my EA2700. Every test shows about half the perfomance when connected through the router. My speed tests at speedtest.net with a direct connection are in the 21-26Mbps range, the same tests run about a minute later through the EA2700 fall in the 10-12Mbps range with spikes up to 17Mbps.I've reset the router and modem.I've gone back to the 1.0.14.129982 Firmware (which it's currently on)I've set the MTU everywhere from 1400 to 1500 (literally EVERY setting for at least a couple of hours) it is 1492 currently. None of these have worked. In addition, when a large stream starts, such as a Steam download, I will lose ALL connectivity. Going in to Network and Sharing and clicking to connect to the internet restores the connection, no need to reset any hardware (which is odd in itself). I have had MANY routers over the years and I've all but exhausted support with service provider as the connection is solid if I eliminate the router.Main machine is a Windows 7 Home edition Total of 5 machines, 3 of which see regular use All machines go through a Trendnet 16 port switch and performance is the same direct or through the switch I m on Brighthouse in Central Florida and have all but exhausted their support.