Tiguan :: 2015 - Steering Wheel Being Off Centered

Bought a 2015 Tiguan Comfortline with appearance package (SE) in August, the car is currently under 2000 KM, I am already having this insane vibration though the steering wheel on highway.

First thing I noticed when I got the car is the steering wheel being off centre just by a little bit, need to hold it a little to the left to drive straight, but I am not overly concerned since the car tracks straight, never took it on highway with stocking rims and tires, and recently I bought another set of winters(rims plus tires) and shop balanced, and installed them myself torqued to 88 feet lbs with cross pattern. Found the steering wheel to vibrate on highway speed, starts at 90km/h (55mph), and get worse as speed increases, one late night I even tried to push the car to 140 km/h (87 mph), and the vibration didn't stop. I could only feel the vibration through hands, but can't visually see the vibration, I does make the car feel unsafe to drive at high speed.

First thing I did was to take the car to another shop to balance, and the tire shop told me He did balance all 4 but the machines only had very minor readings in the weight and they could just be the dirt inside of the rims.

I also checked the tire pressure, all 38 psi to spec.

The vibration seems to be only speed sensitive, doesn't relate to RPM according to my test drives late night.

Now I regret not taking the car on highway with the stock tires, its snowing here already and would be pretty unsafe to put the all seasons on and drive on highway to test it out.