Just recently purchased Power Director 15 and using it for the first time whilst trying to create my first music video. I'm a beginner!

My problem is as follows;

I have just added 6 video clips and a master audio clip to the timeline (1 clip per lane using lane 1 to 7) and I wanted to sync all the files using the audio sync function.

When I select all the clips and select the audio sync feature, it does sync the files but moves all the clips from their existing lanes to lanes 8 to 14?

Why is it moving the clips down to different lanes?