Make sure that you have completely downloaded the full blockchain.
Its Electrum! You should delete this or at least not count it as "constructive" post for the next payment.
@OP
Electrum has a connection? I assume it does since you got inputs later than 14/7, just checking.
From the list of commands [1] it looks like getaddresshistory 1LxL6d5PBL4DXh3ZJjCA7QsJno4g6CLUo5 should do the trick.
getaddressunspent addr. might also work. Both query the blockchain (see source further down).
[1]https://github.com/spesmilo/electrum/blob/master/lib/commands.py