Right, so when I was logged into the FTP account yesterday and seeing different folders from you, it was on islamabad.dreamhost. However, when I tried to login via FTP just now, I got an authentication error and couldn't get in at all. When I was looking at the FTP user credentials in the control panel, i noticed "montgomery" as the machine, not islamabad. Changing the FTP host to montgomery now gets me in, and I can see exactly what you see.
So, problem solved I guess - BUT, can anyone explain how this might have happened? I have been using the islamabad host/machine to manage all the sites under this account and have never had a problem till now. Is there any reason why this might have happened? I'm not very used to Dreamhost so I'm a bit baffled!
Thanks to all for their help on this thread, much appreciated.