Cannot edit a line although I created it

Hi, I created a line (Concordia Reserve) and wanted to add segments afterwards, but I cannot see the edit button. Adding “/edit” behind the URL (e.g., https://trap.nz/node/21980753/edit) gives me an “not authorized” error.
Only when I was made administrator temporarily, was I able to edit. Is this a bug or a feature?
Cheers, Stefan

Kia ora @stefan.marks You project permissions were previously set as trapper, as a trapper you can add lines but, not edit them, which is why when your permissions were changed you were able to then edit them. Your permissions are currently now showing as a manager for the project so this should help you