Problem With Lowering Springs

[blueviol]

Hi,

I just replaced the springs with Tanabe NF210 lowering springs.

The car's now about 1 inch lower overall than the original spec leaving less than 1 inch space between the tire and the wheel housing arch. I thought it would be a little less drop than that.

The ride is a bit more stiff and lost some of the original softness in ride.

It corners much better now.

However I have experienced two problems so far: at highway exits or on fast winding roads, the car seems to oversteer making the car suddenly lean to the outward direction and try to cut in more than it used to. And the second problem is that when I corner hard, the outer front wheel touches the wheel housing. In one instance, I heard the screeching sound.

Are these normal symptoms? Or is there something wrong I need to fix?