SFX Bug

I put some custom SFX into my quest right? The sound Peahats make when they fly(OoT)? Well, in the enemy editor, in the "Background SFX" box, I put 64, because that's the slot with the Peahat flying SFX. Now, it plays ok, no problems there. The problem is when the peahats are gone. The SFX is still playing, until you warp out of that DMap, regarldess of screen change, or until you step on a fairy flag.