It seems a bit wierd to me add both the drl and the dsl in the <scoreDsl>, so I think we need to do it like this:
<scoreDsl>
<dslr>/org/.../file1.dslr</dslr>
<dsl>/org/.../file2.dsl</dsl>
</scoreDsl>

From the manual: "Also, it is better to rename the extension of your rules file from ".drl" to ".dslr" when you start using DSLs, as that will allow the IDE to correctly recognize and work with your rules file."