It definatly went out again on its own, or atleast seems that way to me and there is no possibility that someone else did it, I'm secure and no one in my home has any idea about BTC.
It was originally sent on the 6th, rejected by node on blockchain and then showed as an confirmed credit back to my wallet, then today when I woke up I found this
https://blockchain.info/tx/030610501cd09ebef50efccb23a5ef1c0e76f7be15da740851a1599381940e4dMy balance now shows 0
Was it the same original transaction you sent or did the coins get sent to a new address? It is possible that your original transaction simply confirmed after being rebroadcasted if they went to the same addresses that you were originally sending to.