Yes, I'm absolutely shocked as well. The static would come and go in strange intervals, but since I changed which wall socket It was plugged into, it has not done It again yet. I'll test it for longer periods tonight, and I am still gonna go ahead and hook it up the correct way as Seth recommended being that from what I've gathered here my setup is the worst possible way. I really don't understand why that changed anything by changing the sockets, it was like a last case scenario and the only thing I did not try.
Now the question becomes:
What else is also connected to the same CIRCUIT....the same circuit and NOT just the same outlet (there are almost certainly several power outlets on 1 circuit).
Start asking yourself: "When I hear this static, what other items are running in my house"?
Is your refrigerator cycling when you hear the static?
Is your AC or furnace running when you hear the noise?
Is you cable box plugged into the same circuit?
Something else running only when you hear the static?
The "correct way" would be the "way that works and doesn't cause noise or problems". If you can achieve that now, then do it. There are certainly BETTER ways to set this up, but even the suggestion from Seth (i.e. the outboard converter) is far from the IDEAL way.