Hit a button, don't know what I did

[Nerfboy]

Thanks, worked.

[Aristotelis]

you maped an audio track by mistake

click on any track inside the timeline and press 9...

[Nerfboy]

Ok, was moving the whole line as one with Shift + Alt and dragging...but I did something else and now when I drag a video clip to a line from the bin, it wants to put an additional audio bar on another line as well...did I link something? It does it on every project now.