I have both issues you're talking about (I think). When I'm driving, my car will drift slightly to the right if I let go of the steering wheel. I feel like I'm almost always having to hold the wheel slightly to the left just to go straight. But here's the thing... this was the
exact same way on my previous 2 cars... (Ford Fusion and Dodge Stratus coupe, both V6). If you notice, most roads have a slight "hump" to them toward the center... This is so the water drains off to the sides when it rains. This seems to be the reason that cars will drift to the right. When I drive on a one-way street, where the left lane is the left-most part of the road, I don't seem to have the drifting problem.
Also, as far as the steering wheel when hitting bumps... I'd say this is normal. Again, I have this happen right now, as well as in my previous cars. There are 2 spots in particular where I drive that have this, and both are littered with huge ruts on the left side of the lane only. And every time I hit these sections, my car
severely pulls to the left. Moreso with increased traveling speed, it seems.
So, all-in-all... through my completely non-professional diagnosis (

)... Your car sounds pretty normal to me