Hello, I am a newbie with this software. The project I am currently working on has a audio track/song, and I am editing clips to go with the song. I have 6 very short video clips at the beginning and I have them lined up perfectly where I want them. I have another short clip I want to add to another part of the song, and when I try to drag/move that new clip to where I want it, it ends up shifting the first 6 clips. Also, when it does this, 5 of the 6 clips shrink so thin that it is just a blue line, and I cannot drag the ends of each clip to readjust them.

Is there a way around this, or a way to lock my video clips in place within their layer so that they absolutely do not move? I'm not sure what to do, and it wasn't doing this with any of the other clips as I moved those around.