Instead of dragging and dropping the media files on the Timeline, select the file that you want to add and select 'Add to Timeline' from the Edit menu. Similarly, add all files to the timeline. This way Video Edit Magic will keep the start times of the video and audio aligned.

However, aligning the video and audio might introduce gaps between successive video or audio clips depending on which is shorter in length. To fix this, you can use Video Edit Magic's Split feature to remove unwanted portions of the clip.