Lost Arrange Window and Files after recording with a monitor

Recording an audiobook.
I was recording with Logic 8 and saved the sessions all day long. I used a Macbook and monitor. When I went to backup the project on to my hard drive, the whole days work was lost. The day before, I dragged the folder onto my hard drive and everything backed up fine.

I saved the project all day long but nothing saved. All that was there was the day before's work.

I've recorded 5 CDs and many other projects for years and nothing like this has happened. The only thing different was I was using a friend's old monitor.