yoast odd title

I use Optimize Press, and they suggest the reason the browser shows my Optimize Press pages with <title> before the page title is because I use Yoast.

Is anyone familiar with this?

I’ve forced rewrite of titles. And I’ve placed the command that Yoast suggest in my header.

But still the browser shows “<title>” before my page names.

Anyone know what I can do to get rid of that?

Miki