imovie will not allow additional audio clips

Using iMovie 10.4.2. with Ventura 13.7.4. Cannot add second+ audio clips. Does not allow me to do the usual drag/drop the clip from the media bin to the timeline workspace. It just places the clip on top of the other audio clip, even if its dragged to the bottom of the other clip, etc. I've also noticed that iMovie is not accurately trimming audio clips, sometimes leaving sound at the end of the actual clip that has been cut. Thank you.