armature data item name and bone name explanation

When I add or copy a bone blender is making a new armature item for every bone?
I want one new armature with more added bones that I can edit separately.
I can now only select bone separately in object mode when giving them the same armature data name.
But in edit mode I cannot select them separately.

I think it is because I added the bones in object mode instead of edit mode?

What is the difference between item name and bone name and armature data ?
I am getting confused.

This was the answer for my mistake.

" I think it is because I added the bones in object mode instead of edit mode?"

That’d be the problem ;D