Twitter creator have double @@

It seems it’s a bug, I did not type “@” in setting page – Website’s Twitter Username
The meta info is not correct in twitter:creator, but it’s corrent in twitter:site

<meta name=”twitter:site” content=”@username”/>
<meta name=”twitter:creator” content=”@@username”/>

https://wordpress.org/plugins/wonderm00ns-simple-facebook-open-graph-tags/