Thanks for your help, found it out myself.
AtulSingh you're call is just a filter, not an inline segment. the total is still for the unfiltered data...
Solution API 1.4
When trying "Inline-Segmentation" with Multi-Level-Classification you use just the display-name of the desired classification. it doesn't matter what level the classification is, just use the name.
lessons learned:
1) the level of classification doesn't matter, just use the name
2) never use the same name within the classification ...
3) watch your spelling 
4) you can't filter for "~none~" eg to get the not classified values 
Remark API 2.0: according to the workspace calls the problems should disappear since it's using a classification id.