Thanks for your answer, yes that excactly was my question.
After trying around a little I just learned, that you may not
omit the square brackets even if there are no blanks in the names,
e.g.: [Product].[Product Categories].[Bikes].[Road Bikes + 25%] will put
it on produkt dimension, but Product.[Product Categories].[Bikes].[Road Bikes + 25%] (no square brackets)
will automatically put it on measures.
So again, thank you for your answer and for the great tool.