See there are a few scenarios. I was also facing the same problem with one of my blog which is grabthisdeals.com and with WordPress, I was also using Elementary page builder. Sometimes it happens that when You start adding content on your site your site started taking shape. Once you add categories, posts, tags and pages then and then you can customise it’s position and layout. Moreover, If you are using paid themes like generators then you can also asked this to their support staff.