Why does JSM installation create duplicate fields, resolutions and statuses?

Question

I've noticed that after installing JSM, almost always I have duplicate things automatically created - custom fields, resolutions and/or statuses. Is that a bug? How can I avoid this?

Example for duplicate resolutions, fields and statuses attached.

Thanks

Lior Neudorfer_rdydiu · Answer

@Édpo César I also attached statuses and custom field examples. In the question itself.

Lior Neudorfer_rdydiu · Answer

This is duplicate resolutions for example.

Lior Neudorfer_rdydiu · Answer