URLs that show in features snippets that appear in the right rail of Google desktop results are going to continue being included in the main organic listings, at least for the time being.
The right-sidebar featured snippet appears as a regular listing within the main results column for now.
Google is planning to remove features snippets from the right rail and move the feature to the main listing. For URLs that earn the right-sidebar featured snippet currently appear twice on the first results page. As this is a temporary thing, site owners should monitor their traffic and click-through rate. The URLs that get pushed into the main column will only appear once within the organic results, just as they do for the regular featured snippets