I have a DD who is tall and thin. I took her measurements, started with a girls 16, and added in the measurements I took. The bodice pattern looks right. The pants pattern is showing a weird slant at the waist. She is normal in the waist, so I must have done something wrong. Here's a Flickr link to screenshots. Can you see what I did wrong?
copies of her measurements and patterns

That weird slant is due to the floor to waist conformed measurements.
The side is 42 f/w while the back is 46

correct these measurements IF the waist is NOT that tilted. If it is - its right even if it looks funny.

Kaaren