title: Wordpress get_the_category() is returning stuff I don't want
body: <p>Wordpress's <code>get_the_category()</code> in <code>archive.php</code> file while displaying category slug url is returning array of two categories, one different, not associated with 'aktuality-blog' category I use slug for. </p>
  
  <p>Here is <code>var_dump( get_the_category() );</code></p>
  
  <pre><code>array(2) {
    [0]=&gt;
    object(WP_Term)#4190 (16) {
      ["term_id"]=&gt;
      int(2)
      ["name"]=&gt;
      string(9) "Aktuality"
      ["slug"]=&gt;
      string(9) "aktuality"
      ["term_group"]=&gt;
      int(0)
      ["term_taxonomy_id"]=&gt;
      int(2)
      ["taxonomy"]=&gt;
      string(8) "category"
      ["description"]=&gt;
      string(0) ""
      ["parent"]=&gt;
      int(0)
      ["count"]=&gt;
      int(18)
      ["filter"]=&gt;
      string(3) "raw"
      ["cat_ID"]=&gt;
      int(2)
      ["category_count"]=&gt;
      int(18)
      ["category_description"]=&gt;
      string(0) ""
      ["cat_name"]=&gt;
      string(9) "Aktuality"
      ["category_nicename"]=&gt;
      string(9) "aktuality"
      ["category_parent"]=&gt;
      int(0)
    }
    [1]=&gt;
    object(WP_Term)#4188 (16) {
      ["term_id"]=&gt;
      int(30)
      ["name"]=&gt;
      string(4) "Blog"
      ["slug"]=&gt;
      string(14) "aktuality-blog"
      ["term_group"]=&gt;
      int(0)
      ["term_taxonomy_id"]=&gt;
      int(30)
      ["taxonomy"]=&gt;
      string(8) "category"
      ["description"]=&gt;
      string(0) ""
      ["parent"]=&gt;
      int(0)
      ["count"]=&gt;
      int(1)
      ["filter"]=&gt;
      string(3) "raw"
      ["cat_ID"]=&gt;
      int(30)
      ["category_count"]=&gt;
      int(1)
      ["category_description"]=&gt;
      string(0) ""
      ["cat_name"]=&gt;
      string(4) "Blog"
      ["category_nicename"]=&gt;
      string(14) "aktuality-blog"
      ["category_parent"]=&gt;
      int(0)
    }
  }
  </code></pre>
  
  <p>I expect just array 1 to be array 0, not category actuality there. I can have work around by inserting arrays[1] category int get_posts's $arg.</p>
  
  <p>I don't want workarounds, but solid solution, that would work also on different categories if they ware created, just normal archive, that where I get on category slug, I can simply browse it trought native pagination and so on, not workaround where I will in the end have to rewrite whole cms.</p>