It sounds like google (and/or other search engines) could have made an error when indexing your site (but I highly doubt it). You shouldn’t have that many hit going to your archive pages.
Recovery steps:
Signup for Google Analytics. Use this to determine where those hit are coming from. (GA is more detailed then JetPack Analytics. I’ve also seen errors in JP’s reportings)
Signup for Google Webmaster Tools. This is so you can see how google is hitting your site and what it’s indexing. (you can also request that a page not be indexed)
Find a plugin that can generate a XML site map for search engines. I like http://wordpress.org/plugins/google-sitemap-generator/