Sorry but you read like you have not even read the manual.
Why dont you post one of your 2 degree tilts? Then when we can see whats up maybe we can help you with it.
Im very happy with the Nikon D100, when it came out it was a leading edge camera. Of course now it has its shortcomings compared with the latest models.
But every shot in my port is with the D-100.
Stu
Looking forward to seeing what D-200 is like.