Ok, I have been a long time user of WP and have been using All in one SEO(AIOS).
Given the multitude of functions it has I thought of trying Yoast SEO plugin.
In AIOS, I would define a post title (How to tie a a tie?) and it will automatically take the site name (Mashable) from the template to make it
for example: How to tie a a tie? | Mashable
We do have template system in WP SEO but it works in either/or mode. If I don't set anything in my post title it picks the default format fine but in case I put something in the post level title box, it doesn't automatically pick the site name.
I am wondering, is this the expected behavior of this plugin?
(I have tinkered with settings like force rewrite, setting wp_title etc but all in vain)