I had enabled EVENT section and installed elementor plug in to get a new format for event, i uploaded the event schedules manually, since the format did not come out as expected, i deleted the format, inspite of deleting the format, it was still visible, to clear the same i disabled event and also deleted the elementor plugin, but it was still visible and overlapping the gallery section.
The gallery got affected with event leftover urls overlapping on the gallery and gallery looked distorted. Then i created a new page for gallery, dumping the existing one, but the situation remained same.
For the time being i disabled gallery too until i get help from you.
Yesterday i uploaded 2 blog post, the moment i published i saw the entire home page was covered with blog content and the event/elemantor content.
In between i deactivated and deleted an existing Caching plugin and installed a new one, which is presently working now.