Servus Paul,
I have moved your question to a new topic because you should try to avoid mixing/hijacking other topics 
Thanks
To you question:
I assume, that your scenery-file is messed up and therefore you have this issue. That´s not really navdata related because this can happened in every package in your community folder.
So, please follow these steps EXACTLY!! Exactly is important, therefore in uppercase and your scenery-file will be re-build/re-organized … I guess, that should solve your issue.
Here the link:
Crossing finger, that it helps … let us know please!
Danke dir & liebe GrĂĽĂźe
Richard