There is an item in the outliner ( 3rd red box) that I have already organized into a folder (2nd red box). And I understand that it is under one parent object so it appears a second time (1st red box) and that's fine but the 3rd appearance of the item should not be there and can't be moved or removed. I mean i can disorganize and move it into another folder but i want it removed because it causes confusion. Why is it there and how do i remove the 3rd appearance (3rd red box). I've noticed it happens alot with other items as well.
If you move a parent into a collection, but don't move its child, the child will stay in its current collection. Now if you want you can move the child in the same collection. Another thing is that an object can be part of several collections, if you right click and Unlink it will be removed from the collection but will stay in the other ones it is part of.