Go to the Systems Settings pulldown menu. Under the “scratch disks” tab is a checkbox for capturing audio and video as separate files. Make sure this box is not checked. I’m not certain, but I believe this setting may be tied to each persons user preference information, so each time this particular user logs onto the machine and opens up FCP, that box will become checked and the separate files will result. Uncheck it, quit FCP and the next time the user logs in, all should be OK.
Tom