Repeating shortlist shows duplicate reusables when it should not

I’m using the mobile builder to make a project management app for photographers. I have ‘projects’ as a data type with ‘collaborators’ (other users) as a field. The data source for the shortlist is ‘search for projects,’ the source for the mobile reusable is ‘current item’s project’. When I test it, there are duplicates of the same collaborator based on however many number of projects they are in. Not quite sure where the issue lies. Any help is appreciated!

Take a look if the data is not duplicated in the database. Perhaps some process is wrong and causing this duplicity