Sync'd Audio adding astricks to filename

Can anyone explain why the (*) is being added to the audio filename portion of my clips in the timeline for clips that are sync'd audio/video files?
My process is to highlight the video and the audio, choose the sync audio by waveform method. Then I drag the video file onto a timeline. I have tested syncing by hand and the issue still occurs.
My process is to highlight the video and the audio, choose the sync audio by waveform method. Then I drag the video file onto a timeline. I have tested syncing by hand and the issue still occurs.