Looking at one of my databases that has around 28k entries a few minutes ago I noticed that all the sudden it had 50k. A bit alarmed I checked with a few of our other PHP programmers and they weren't running any operations on the database. I browsed the database again using php my admin and it had 40k entries. I then notified one of my colleagues and we looked at it on her computer, the screen showed 60k entries. I promptly backed up at this point. Currently the system is back down to 28k entries. Any ideas on whats happening?
Bit hard to tell what is going on from this end. Have you checked the contents of the inserted rows? Is there any logging? What data is being stored?
Are the tables from the database available in update or insert mode from the outside, via web applications? Are you not suffering from database injections from malevolous person? To identify this i strongly recomand you add audit fields to your table description (insert user name, insert date, alter user name, alter date) so that you can evaluate if the responsibility is external to your applications or not.