Following a virtual total loss of rankings on G on May the 5th, I initially thought some sort of penalty had been applied ( this could be the case ), but just to be on the safe side I took a look at our site to check for any immediately apparent problems.
Some things seem to stand out.
1. For some reason G has indexed all of our site on the standard http, but there are also duplicate pages indexed for the https equivalent.
2. In some searches for keywords, the https version of the index page is getting shown as the first result found ( not the first result in the listings, but the first reference for our site )No other pages are getting found.
3.In some instances the http version is getting shown for other different keywords.
4. The site has lost no page rank for the index page and some of the product pages ( not that many, only about 4/5) The page rank is the same for both http and https.I dont know if that is normal or not.
5. News articles published under the http are showing as " Current page not ranked by G" but the https pages are showing the page rank...some of these articles are showing in the index as https, others just can be found.
6. All pages from our menu system are showing on http as " Current page not ranked by G", while the https duplicate is attracting the pages rank.
7. As stated previously only our index page and 4/5 product pages are showing page rank for the http ( and also the https )
8 There are also some other issues found with regards to a largish number of spam backlinks which that have been generated via a dynamic url.These backlinks are showing up in WMT..over 100 of them.
mysite.com/?word-word-word ...where every instance of word is the same( word).
Interestingly enough this word is one of our target keywords, but what has happened is that we now have over 100 backlinks pointing to this page, which is now listed as a page in our site by G ( the page shows the index page, but the url is hown as mysite.com/?word-word-word
NOTE there is a seperate thread about this last point below.
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webmasterworld.com ]
Before I start looking into any other problems, would these issues cause such a dramatic fall in rankings.