Premiere Pro Multiple Empty Tracks On Import

[Len Rosenberg]

Camera is a Sony Z200. When I import a video clip (via drag and drop from hard drive to the timeline in Adobe Premiere Pro 2026, I get three video tracks and eight audio tracks. Only one video track and two audio tracks have content, the others are empty. The camera is set to record audio only on inputs 1 and 2. The delete all empty tracks command works on video tracks but not on audio tracks. My questions are 1) how to stop Premiere from creating empty tracks on import, and 2) why does the delete all empty audio tracks not work? I've tried researching this on google but have not found the answers. Many thanks for any help.
Len