Help please. I sent a bitcoin from GDAX to GateHub and it says I sent it1/2hour to someone else!

Help please. I sent a bitcoin from GDAX to GateHub and it says I sent it1/2hour to someone else!

On the Blockchain, my bitcoin transaction is green Then a half hour later it says that I sent it to this address that is not mine and I didn't send it: 1Ccb4vrC5atJHHdj3hHhYwJmYxtVZLZXWc The arrow and button are red. What does that mean? Did I get hacked? What can I do about it? Thanks for helping!

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