I have a 4 port usb hub + card reader combo device and it's quite unstable. It came with a special cable it seems. One end is miniusb that plugs to the device. The other it goes to regular usb and then has another part that comes out and is another usb head. Both are male, so it's not like it's allowing another device to be plugged in. Does this mean I should plug both into separate usb ports on my pc? It works on just one, but not well at all, although I think the device is just shitty to begin with.