Question: I would use 14/2 Romex coming from 15amp circuit breaker then pigtailed to 2 differnt Light switches. [![enter image description here](https://i.stack.imgur.com/74zA0.jpg)](https://i.stack.imgur.com/74zA0.jpg)

Answer: 
Everything you are describing *could* be explained by a disconnected neutral that might be within your premises or outside. You should start by calling your power company and suggesting they come look for that specific problem. You could also call an electrician to look for it.

With this problem:

* Some devices will not work sometimes, or will work partially or poorly with fluctuating supply voltage when *other* devices are turned on. The connection between devices will appear random.
* Devices with metal housings (including the metal housings on HDMI cable ends and the ground shield on coax cables), where those housings should normally be at ground potential, may come up to various voltages. The effect gets worse if the building's grounding is poor or doesn't exist.
When you say the HDMI and Coax are hot (22 V - 60 V), I assume you're talking about the outer metal shell on those cables? If that's the case, it means that all your metal chassis/boxes are hot, which is bad.

Since those metal boxes/chassis should be connected, eventually, back to earth ground, that indicates there may be a problem back in your circuit breaker (or fuse) panel. Like maybe the neutral and earth ground have been reversed, or one of them is no longer connected.

Unless you have some experience in this area (these kinds of problems can be tricky to track down the root cause of), you need a good electrician.