KVM Peripheral Power

I currently own this Iogear KVM switch:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817399087
I use it with a Razer Deathadder Mouse and a Lycossa Keyboard. The KVM switch works perfectly fine surprisingly, however there is one issue.
Once the computer is powered down the peripherals shut off for a split second, then turn back on. They will remain powered on unless I detach them from the KVM switch. Does anyone know of a way to prevent this from happening. Thanks in advance for any help.
Answer #1
? Unplug the pc’s from the mains. I guess it’s still drawing power through the pc, not much you can do besides what you are doing already.
I’ve got a couple of KVM switches (2 and 4 port) but never had that happen.
Answer #2
I figured as much, I just found it odd that it was happening to begin with.