kakawajazz

Thanks

Here you can see that post have been related:
https://take.ms/gGf

My initial settings:
https://take.ms/mGf

With these settings I have the view:
https://take.ms/nGf

Changes in settings:
https://take.ms/pGf

Changes in view:
https://take.ms/vGf

P.S. while writing the answer to you I change settings to more successful. Now all looks great.
Right settings:
https://take.ms/TGf
Right view:
https://take.ms/gHf

Thanks a lot, Julio!

Thanks! It works now, but not quiet correct.
It looks like if i set Display something is no related posts are found? option to Do not show anything., no post are displayed.
If i set the option to other position (custom text), there appear two related posts at once though I previously add only one post.

i’ve solved by changing line 439 in share-button.php:
return $share_buttons . $content . $like_buttons;
replaced by
return $share_buttons . $like_buttons . $content;