Does .RelatedPages also show index.md files?

My code is as follows for my related.html partial, but it seems to be listing an _index.md file. I wonder why that is. {{ if ne .Section “” }}

<div class="related">
    {{ $related := .Site.RegularPages.Related .Page | first 16 }}
    
    {{ with $related }}
    <h2>Related Articles</h2>
    <div class="row">
        {{ range . }}
        {{ if ne .Section "" }}
        <div class="col-md-3 col-sm-6">
            <div class="box-image-text shadow" style="height: 280px;">
                <div class="top">
                    <div class="image" style="overflow:hidden">
                        <a href="{{ .RelPermalink }}">
                        {{ if isset .Params "banner" }}
                        <img src="{{ .Site.BaseURL}}img/placeholder.png" data-src="{{ .Params.banner }}" class="img-responsive shadow" alt="{{.Title}}" width="255" height="192" title="{{.Title}}">
                        {{ else }}
                            <img src="{{ .Site.BaseURL}}img/placeholder.png" class="img-responsive" alt="{{.Title}}" width="255" height="192" title="{{.Title}}">
                        {{ end }}
                        <h4>{{ .Title }}<h4>
                        </a>
                    </div>
                </div>
            </div> 
        </div>
        {{ end }}
        {{ end }}
    </div>
    {{ end }}
    
</div>

The 5th one should not show up as I’m only doing {{ $related := .Site.RegularPages.Related .Page | first 16 }} first 16, but filtering out using {{ if ne .Section "" }} (if page doesn’t belong to a section, don’t show it)

Also, the blank tile is a link to /psychedelics/ main category which as no articles, but only an _index.md with the contents:

+++
title="Psychedelic Research"
description="Explore the best resources in the psychedelic world"
+++

I renamed /content/psychedelics/_index.md to _index.md.backup and still it was showing up. I even deleted that file and a blank link to /psychedelics/ still shows up.

Not sure what’s going on.

Also, just using .RegularPages.Related gives an error:

Building sites … ERROR 2018/08/31 21:22:28 Error while rendering “page” in “news/authors/hash-borgir/”: template: _default/single.html:76:31: executing “_default/single.html” at <partial "related.htm…>: error calling partial: template: partials/related.html:2:32: executing “partials/related.html” at <.RegularPages.Relate…>: can’t evaluate field RegularPages in type *hugolib.PageOutput

even though all the document says to use “.RegularPages.Related”: https://gohugo.io/content-management/related/