Typically I use All in One SEO, though after my first site ranking amazingly with Yoast SEO and no backlinks, I decided to use it on a new authority site. However, I have noticed that google seems to fuck with my titles only when I am using yoast seo. I skimmed over Joost's explanation; where he claims that solely google dictates to re-write titles, with no correlation to wordpress seo, however I disagree based on feedback. I have 25 sites or so currently. Of those 25: 23 are running All in One SEO and 2 are using WordPress SEO. My very first site was made in Dec '13 using yoast and the homepage title always gets re-written by google as "brand: title". Always. I then proceeded to make 23 more sites using All in One SEO and have never run into this or any SERP title issue again, period. Just this week I chose to use Yoast again for a new authority site I'm building and low and behold, my site indexes via google with homepage as "title - brand" (as I specified). However, 2 days later it changes to "brand: title". I am also getting one really weird scenario where a post is displayed as: "title - homepage title" (again weird where its drawing that homepage title from as its not my site title/brand). My settings: Post title template - "%%title%%". Page title template - "%%title%% - %%sitename%%". I have "force re-write titles" checked. Based on this it seems to me there is definitely a correlation towards yoast plugin and google changing titles. This is probably overkill for this forum but this is something that can hinder your SEO. Has anyone else come across this or something similar using Yoast?