LTC transaction suddenly doubled in wallet?

[jellex]

Hi,
I transfered 4LTC from my Jaxx wallet to another address. Somehow 8.3LTC where taken from the wallet suddenly and the history shows: https://live.blockcypher.com/ltc/address/LbTjRcMKtK1GjhwsJ7N6cFgYSSPUqE6qgS/
It was cut in two pieces (two outputs); my 4LTC which indeed arrived, but another part that was just taken and send to another address I didn't enter. Can someone explain how this works? How can this transaction occur?

thanks.

[jellex]

Ok, I'll leave it for future reference.
The other block was transfered back to my wallet much later... That is how the blockchain works it seems. I still have to get the hang of it