authors full name on or off doesn't seem to have effect

I only want to show the authors' username en no full name in the widget type"Tweets". But when i turn it off in the backend, there is no difference. It still shows the authors full name.

I tried to turn on/off cache, cleared system cache several times and refresh page. etc. tried to find the code...

cache is turned off, module id is auto.

Looking forward to your reply

Hi, have you use a lasted module version ?
Because my new version of Social GK5 for J2.5 looks like this

social.jpg

social-2.jpg

When you choose "tweets" in Settings ->Widget type, your layout will change and will look like my screenshot.

yes, I use the latest version. downloaded today.