Yep-as others have said. “gluing” is just one of those strange things. It’s not actually “bouncing” the audio in to a single thing. It is just acting more like a container. You can double click on the glued part and then you see the individual parts and you can adjust the audio like normal. Or as others have said, just click “b” and bounce the glued part in to a single audio file if you know you don’t need to go in and change the pieces later.