No audio at all or audio tracks with 0 content?
Because if there's a green block at all, it will still move out of sync. Press move in sync and see what happens.
If there is an empty audio track you don't want you can delete it. There are three buttons which are like the snap, link selection buttons at the top right of the track window. If you press, I think, the middle one (hover over it, should say link selection) and press that you can move the audio away from the video.
I'm still playing with it too, I don't know it as well as FL. Most annoying thing is rendering. Why the **** can't it do reverb in realtime like a DAW? lol