Remove Multipal category From Post to see on Front Page

sir my site is and i post many content to my site but i when i post to my site and check the ceatgory from the right side that is related to my topic and publish the post now the publish post cannot appear in the homepage its only show in category now when i select the related category and unrecognized category the post show on my front home page i want too remove the unrecognized category and want to show my post in front page