Build problem with multi spec

Hello everyone, I have a problem and acceptance with a request for factory. I want to build a package which builds an application with different versions for Leap and Tumbleweed. First attempt was to query in spec what is built and then set the version number dynamically. Worked in the home and devel repo. But was then rejected by factory. Second try was with 3 spec and change files for Leap 15.5, 15.6 and for Tumblweed. Also worked in home and devel repo. But again factory rejects it. Factory says it has no change file. But it actually has three! What should or can I do now to have a package that builds once for Leap in version A and for Tumbleweed in version X? Regards Eric