Backup and restore issue

[baggins]

A couple of days ago we had a power cut and after the power came back on I noticed that in one of my LM4 (I have two in my home) there was no data anymore in the trends.
As as take daily backups, I took the backup of the previous day and did a restore.
After the restore there were still no trend data and I noticed that some GA and a script that I added some time ago were also missing.
I looked in the backup at the current.db and I could see that these GA and the script were actually there.

At first I thought I made a mistake, so I did the following:

• added the GA and the script to the current situation
  
• manually took a backup
  
• took a backup of all scripts
  
• restored the previous day backup
  

Note: I had unzipped the backup file in order to be able to look at the current.db. I then gzipped again (on Fedora with gzip). When I tried to restore that file I got an error message saying that the backup was invalid. I had another copy of that file still compressed so I used that one.

After the restore, the situation was the same as previously: no GA nor script, no trend data.
I then restored the backup that I took manually: same result: the GA and the script were  gone and the trend info that was acquired the previous day was also gone!
I did a restore of the scripts backup to get the script back which worked.
New trend data is acquired.

Any idea what is going on here?