Hello,
Please excuse this Google translation.

I created a profile for a DR 400. Prepared a flight plan and I have a result of weight and balance in the limits.
Do you have an idea?

I guess you are confused by the green dot outside the envelope.
This dot shows the theoretical situation if you would have filled up all fuel tanks to the top.

We are using SD on some different types of aircraft and I can confirm the calculations of SD to be correct if the input data are correct.

Hope this helps