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I have a site that in the head section we specify a base href being the domain with a trailing slash and a canonical link href being the relative link to the domain.

<base <="" span="">href="http://www.domain.com/" />

href="link-to-page.html" rel="canonical" />

I know that Google recommends using an absolute path as a canonical link but is specifying a base href with a relative canonical link the same thing or is it still seen as duplicate content?

I made a small change on an ecommerce site that had big impacts I didn't consider...

About six weeks ago in an effort to clean up one of many SEO-related problems on an ecommerce site, I had a developer rewrite the URLs to replace underscores with hyphens and redirect all pages throughout the site to that page with the new URL structure.

We didn't immediately update our sitemap to reflect the changes (bad!) and I just discovered all the redirects are 302s...

Since these changes, most of the pages have a page authority of 1 and we have dropped several spots in organic search. If we were to setup 301 redirects for the pages that we changed the URL structure would there be any changes in organic search placement and page authority or is it too late?