Ambient Sound Issues

[Seadog]

So, I just got into SFM, and I know the basics of pretty much everything. I dont generally record for stuff, I like to use pose to pose, as I find it much cleaner with no problems. Ive recorded a scout running, and I have a camera on a sniper on the other battlements (2fort), but about a second after the scout steps outside, the ambient sounds play for outside. Now, I would like to either get rid of the sound or extend it to when the scout steps out. But for some reason the sound for the scout is tied to the current shot. As I want to snap to a different camera position, I end the shot after the scout runs under the bridge, and the ambient sounds stop. Any way i could extend the ambient sounds, or snap to a different camera pos while still in the same shot? To anyone who read this far, thanks!

[Seadog]

link to sound- i didnt know where to upload it -- http://yourlisten.com/Dryden/sfm-sound-problem