After recording, it takes a while to show up on the recording's tab.
Why do it do this? I don't know if this'll help, but I'm playing World of Warcraft.
Recordings should appear more or less immediately but I suppose if you are saving extremely large videos, there may be a bit of a delay while the video is processed. How large are your files and how long is it taking for them to appear?
If you use the Send a Problem Report option on FBX's Support tab, we'll take a log at your log files to see if we can see anything unusual going on.