There has been some bizarre behavior of the new wallet. I got a bunch of stakes, two confirmed, and then I had two debits from my account that I didn't send. I wasn't even in the house at the time they were sent. Luckily, they were somewhat small. What is going on?
Same thing happened to my buddy...he got few incomes...last two were outcomes...he also did not send buzz to anyone...good thing the outcome transaction were small...but still...why did this happen...
Are you both on the v3.1.1 wallet?
These outgoings sound like they're the Development Fund fee - it was outlined in the changelog document when it was released. It's to help the team fund the projects that are being worked on.
It's advised to backup your wallet.dat file after each time the fee comes out, as it generates a change address - don't just dump the private key, copy the file itself. You can either do that or send all coins back to your main address. Or do both, of course!