By the way, this post from your other thread.
1CT8Gab2ajLQGmqhJY5wLrrheNCd5w78Gv
This is one of your own Change addresses.
In Bitcoin, just like when you buy something with a large paper bill, you receive change for your transaction.
The change is automatically sent to a new address within your Electrum wallet.
Blockchain.info sends change back to the sending address. This is very bad for security reasons, so Electrum generates new addresses for every transaction.