Audio clips became "linked" and I can't edit just one

It’s very odd. Every time I click on an audio clip, several others get selected with it. If I delete one in this group, it deletes the rest. I’ve tried shift+u and shift+g, but it doesn’t unlink them. This is a really annoying issue. Any ideas?

Unselect the “group editing” button on your folder track.
Check the capture attached.
Group_editing.jpg