In July, we changed our homepage to HTTPS via a 301 redirect from HTTP (the only page on our site with HTTPS). Even though we have significantly increased backlinks to our homepage, we have had no change in search ranking.
Do we need to submit a new sitemap or update our robots.txt file in order for Google to correctly associate our HTTPS homepage with our site?
We noticed that our Google Webmasters Tools account is not showing us any stats for our homepage so we added an HTTPS Google Webmasters Tools account in order to track info to the homepage. The HTTPS account ONLY shows us stats for the homepage which gives the impression it is reading our homepage as a separate site than the rest of our site.