A couple weeks ago the server's power failed and the backup battery ran out of energy. So it turned out without saving properly. We lost about a weeks worth of work at that time.
I may look into daily backups soon. They are more advanced than the type of backups I do now but also not as reliable. However, they are more flexible and allow us to save more often.
If your house is gone, it was likely that it got undone when we jumped backwards by 1 week. Things have been smooth since then though. No problems.