Black Encasing Automatically Grouping Clips??????

I posted a screen shot below. I have no idea what to call this. It's the automatic black grouping things that attaches clips together. Is there a way to disable this feature or delete the black incasing without deleting all the clips or dragging them out of it and moving everything around. REALLY annoying when it does this and I need to go back and change something. See my timeline below.

You've placed the clips in a "Secondary Storyline," as indicated by the black band/box at the top. This can happen automatically/inadvertently when you add a transition to connected clips. Use the command "Lift from Storyline" to turn them back into plain connected clips.

It takes a while to get the hang of the magnetic timeline and its strengths and weaknesses.

Thanks Bud. I recently upgraded from a Pro X version that didn't have this feature and it has been driving me insane on account that it was hard to troubleshoot without knowing what to call it.