That is correct and was actually intentional. As I am neither the original Author of the script nor do I have Space Engineers installed anymore, unfortunately I can not fix this issue for you directly, however you are welcome to make your own edit of the script or just rename your other Planets.

This applies even if the planet just contains the name 'Bylen', not equals.

It would appear after reading the script and internal testing, that this is caused by the initializer in the code recognizing any planet named 'Bylen' to have the script applied, rather than by planet type.

Hello, I'm using this mod in a scenario, with it upscaled. It would appear the script used by this mod to destroy blocks close to Bylen is using an incorrect radius, causing any block on any nearby planet to also get destroyed. It would be appreciated if this were to be fixed asap, so I can avoid another reupload. Thanks!

very nice, just what I was looking for!