Why secondary menu is showing in Slideout Menu

https://prnt.sc/lkhc9r
Here is the image

I'm only seeing those menu items in the Slideout Menu: http://prntscr.com/lkhd41

I'm not seeing any of your secondary navigation items in there.

http://prntscr.com/lkhdya
Why this Secondary Menu is showing i have already added all items of slideout menu.

Ah, you can remove that like this:

@media (max-width: 768px) {
    .secondary-navigation {
        display: none;
    }
}