storiale, welcome to WebmasterWorld.
If I understand what you're reporting, Google is once again displaying multiple results for certain queries. This type of serp display predates the Search Engine Land story of September 14, 2012, by quite a bit. The SEL story in fact described one of the steps Google took to fix what had become a very unpopular type of display among many webmasters, particularly those with smaller sites.
Some very rushed background for now... traditionally, Google had used something called "host crowding", to limit display to two results from a given host, to prevent dominance by a given domain. At various points in the evolution of Panda, Google begain testing a variety of display types in serps to display multiple results for certain site and query combinations. These have included Sitelinks, as well as smaller inline "mini sitelinks" under a main listing.
Without getting into a more detailed history now, one of Google's most controversial serp displays (which I still see on extremely longtail queries), was to return multiple listings from the same domain. This is actually the opposite of "host crowding"... it's in fact
"host uncrowding"... but it's been incorrectly called "host crowding" by many members here.
For now, I only have time to provide some brief comments and a couple of links to two key references. The first is a long and contentious discussion in this forum, when some sites dominated almost entire pages...
Many results from one site - Host Crowding vs Brand Authority June 11, 2012 http://www.webmasterworld.com/google/4464096.htm [webmasterworld.com]
I believed then, and still do, that this was essentially a display of a different sorting of algo weightings and user preferences, providing an alternative serps view for Google to gather data and adjust its algo. The "uncrowding" issue was cleared up fastest in areas where traffic (and thus data) was greatest, but in many niches it took a long time. I see some where the queries are so rare that they've never gotten cleared up.
See also Matt Cutts video on host crowding and multiple results...
How does Google decide when to display multiple results from the same website? June 11, 2012
trt 5:40 http://www.youtube.com/watch?v=AGpEdyIcZcU [youtube.com]
If I make a big assumption that what you are reporting is statistically significant and is connected with the above... and that what you're seeing is host uncrowding... then it's interesting that this is reappearing now, at a time when there are many reports of Zombie traffic. Both these "uncrowded" multiple serp results and Zombie traffic occur in low trafficked areas. These may include longtail queries, as well as simply obscure products.
I've checked old queries that were showing multiple results in 2012, and those are not being reassessed, so I'm guessing it's very longtail phrasing and very obscure niches... and this leads to the thought that these could be the kind of unusual queries that get rewritten by RankBrain.
If you can characterize the types of queries you're seeing without posting specifics, that might be helpful. Note that for multiple reasons we do not allow new members to post specific domains or queries.
You can contact a moderator, though, if you have anything unusual you want to share... but please note that all of us are volunteers, with only limited time.
