As a disclaimer I'll say first that I don't own Bitshares, and maybe I have some big information deficit. But do I get this about right:
You guys just accidentally created yourself some coins. Nobody but some internal group even noticed (wha?!). Then you don't tell, and just change the code so that it's fixed. And I'm about the only one stunned?

If you say that you fixed the bug, so all is well, then I would say you miss the problem.
Which info am I missing when I think any other coin would be destroyed if it would work like that?