If you open http://tarielzivzivadze.ge by OPERA or Mozilla, you see the mentioned post on the first page in teh List page
But if you open the http://tarielzivzivadze.ge by either IE or Chrome, the post is not there on the list page
In addition I see one post [different] dublicated in IE and Chrome [just scroll and you will see
WHAT CAN BE THE REASON?
couple of days ago I installed two plugins – Wordfence and WP-Optimize and renamed the categories [used georgian symbols in category names]