By default the Yoast SEO plugin outputs the same homepage title tag format as the Twenty Fourteen theme, the reason for this is under the Yoast options page “SEO” >> “Titles & Metas” : under “Home” tab the default homepage settings are.
%%sitename%% %%page%% %%sep%% %%sitedesc%%
What the default options output is
Site Title : Archive Page Number : A Separator : The Tagline
This is far from ideal, the best SEO output for the homepage title tag is:
%%sitename%% %%page%%
Site Title : Archive Page Number
This would output the following title tag on the homepage for this site:
<title>SEO Gold</title>
and for homepage archive pages
<title>SEO Gold Page 2</title>
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