I'm new to electronics so any helpful advice or resources would be greatly appreciated. I built a USB switch to connect my keyboard to two PCs using a 4PDT switch and it works great. Now I'm trying to add LEDs to indicate which PC is connected. I added LEDs in the manner this diagram illustrates only using the switch above instead of a rotary as shown.
My problem is both LEDs are powered in both switch positions (A/B). Why would this be the case when the LEDs are connected to power from separate USB connections and only share the ground? What can I do to correct this behavior and illuminate only one LED based on which switch position is selected?
Here are some images of the circuit. Helpful comments welcome, but I know it's an ugly prototype. You will note the resistor through hole N07 is purposefully disconnected until I can wrap my head around the issue.