Hi Filip. This is really outside the scope of theme support. I loaded the plugin on a test site and, based on the way you have it implemented, it will show the tiles for all the posts in the category, in every location that a normal post would be displayed on the archive page. So it sounds like you have 6 posts in the category in which case you would see a group of 6 tiles repeated 6 times. I checked the plugin documentation but it isn’t very descriptive. Have you tried asking for additional information on the WP Tiles plugin support forum?