Weird network Slows my Laptop Connection

[OrangeSoul 0]

Ok heres the thing

I have Vonage which gave me a Linksys Phone Router. The Phone is connected to the router. My main computer is also connected to the phone router

Now i have a wireless router for my laptop. My Wireless Router is connected to the Phone router. and my laptop is connected to this wireless laptop

For my Main computer, i get speedtest of 5.8 Mbps down, 800 up (advertised 5 down, 800 up),

but for my laptop , i get speedtest of 3.2 Mbps down, 800 up

how do i increase this. I have using a Linksys USB wireless connector to the laptop version 2.6 to connect to the linksys wireless router