Items showing up twice?

Does anyone have any advice on why sometimes I have items show up twice in my outliner?
Sometimes if I move them from the bottom (outside collection) into the collection where they belong, the apparent duplication goes away. ie no duplication appears in the collection folder. I just don’t know why this keeps happening. (version 3.0.0) Previously discovered newer versions of Blender do not run well on my laptop at all and simply crash (quit responding) immediately. .

Items can be in multiple collections- collections are more of a “tag” than a “folder”