This is an unfortunate bug in our server, and even more unfortunately, we don't currently have the manpower to fix the bug. We do have procedures in place to minimize the chance of this bug, and for the most part they work, but it slipped up this time.
The only solace I can offer is that this loss happens evenly to everybody, so you haven't been singled out by some random chance or anything.
Sorry for the inconvenience.