Seriously, all of these "my BTC was sent an address I don't know" posts are ridiculous. It's like at least once a week about change addresses.
Whats so ridiculous about those questions? Its a hard to grasp concept that bitcoin comes in lumps and is not just a balance where one can deduct
a certain any amount. The questions only shows that most wallets do a very good job in hiding the details of the implementation from the user and that blockchain explorers are an unreliable tool when trying to assess a wallet.