do not panic... 1MQYVDp... is your change address for sure
check your total balance in your wallet, it should add up fine
you're using your 0.3 BTC to send out 0.09976332 BTC and
receive 0.20000000 BTC as change back to your wallet but different address
Check my wallet, and do not have this address
![Cry](https://bitcointalk.org/Smileys/default/cry.gif)
I believe Bitcoin Core hides change address by default. Try going to debug window console and using:
It should list all your address I believe. If that doesn't work, try
dumpprivkey 1MQYVDprRKZPo8zrxSYkDrjKYNLTANsLdt
If this gives the private key, then it means you have control of the address.