For what it is worth, I've noticed the pay to address for my account disappears from time to time, usually around changes in the code. It goes from populated to blank. When I see this, I promptly repopulate the field and save it so as not to get caught. And I tend to remain conscious of pay cycles to monitor that. Again, from my IT background I'm conscious of things like that and look for it.

It would be horrible if something along that line happened during your large payment cycle, beetje2007, and the timing of your similar monitoring was off a bit. But the site's internal, non-public logs should demonstrate if and where the payment was sent. MakeBTC probably has already checked along these lines, but I offer it from my experience in case he hadn't audited it that way.

From how it effects me, personally, it is a simple bug, irritating nothing malicious. However, if it caught beetje2007's funds, I can see a much different interpretation. Regardless, I expect MakeBTC to find the root cause and make it right beetje2007 as well as for everyone's success.