Hi there,
While doing some research on the indexation status of a client I ran into something unexpected. I have my hypothesis on what might be happing, but would like a second opinion on this.
The query 'site:example.org inurl:index.php' returns about 18.000 results. However, when I hover my mouse of these results, no index.php shows up in the URL. So, Google seems to think these (then duplicate content) URLs still exist, but a 301 has changed the actual goal URL? A similar things happens for inurl:page. In fact, all the 'index.php' and 'page' parameters were removed over a year back, so there in fact shouldn't be any of those left in the index by now. The dates next to the search results are 2005, 2008, etc. (i.e. far before 2013). These dates accurately reflect the times these forums topic were created.
Long story short: are these ~30.000 'phantom URLs' in the index out of total of ~100.000 indexed pages hurting the search rankings in some way? What do you suggest to get them out? Submitting a 100% coverage sitemap (just a few days back) doesn't seem to have any effect on these phantom results (yet).