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The main fix is to literally use a different type of second camera. I suggest the Microsoft 1080: [link]. Or check out Purple's fix below - I personally would just get a different cam for the convenience of not having to unplug cameras every time an adjustment needs to be made.
You will have a delay like that with a 2.0 USB capture card. I suggest picking up a 3.0 USB external or an internal capture card as they won't have much of a delay.
We have a 2 PC setup similar to yours, so feel free to ask more questions!