Your coins weren't moved to your own wallet.
Having a single output with round amount doesn't always mean that it didn't changed hands (the keyword in the WiKi is "likely").
The message that you see in that specific blockexplorer is just a generic tag to such transactions, but it doesn't mean that it's always the case.

It's pretty obvious that if all of your funds are sent to a single output, then there wont be any change left to use a "change address".
For the exact (round) amount, it's common in tools that automatically set the fee from difference of the input(s) and the output's amounts; e.g.: createrawtransaction rpc in Bitcoin Core.
or even Electrum's "output value rounding" feature if enabled can produce such output.

Uhh, you have an executable that you verified or run Electrum from source?