I'm using Premiere Pro CC 2014 trial to evaluate if I want to switch from Vegas Pro 2012 to the Adobe Suite. I'm editing a short video I made in Denver, CO this past summer that I shot with two cameras; the Canon 550D, and the DMC-LX5. After adding a few clips to the timeline (approximately 15 or more), every video after that does not have an audio track automatically added but does have a video track. I'm simply dragging and dropping videos to a single sequence. If you play the videos in the project window, they play with audio. What's going on?