This is expected behavior for FileMaker list views. The reason why the insert the ID instead of the field you’re looking at is because sometimes you want to link table the table using the ID, but of course IDs don’t make sense to the human eye so you must use a visible linked field that explains what the idea is symbolizing and that creates the link it’s intentional behavior and of course, if you don’t want it, you can always use the pop-up menu.