Title Tag output from header.php in child theme puts site name first

We use a SEO plugin called wpseo to handle our title displays.

Up until a week ago, everything worked and we always displayed Post title – Gentleman’s Gazette.

Now I notice that it displays Gentleman’s Gazette – Post title which is bad as it hurts our ranking and we are getting a lot less traffic.

I disabled the plugin and the output remains the same.
If I remove this line from the header.php in the child theme, the title tag disappears:
<title><?php if(function_exists('avia_set_title_tag')) { echo avia_set_title_tag(); } ?></title>

and this displays the structure: Gentleman’s Gazette – Post title

How can I make sure that I get the title tag structure back ?:
Post title – Gentleman’s Gazette
and
Page title – Gentleman’s Gazette

• This topic was modified 5 years, 7 months ago by gentlemansgazette.