Extra Buttons on Page Menu Bar

This is my first attempt at building a site, so I don't know how to ask this question correctly or the terms to search for, so please be patient and kind.

I am trying to edit the page menu and for some reason it has little extra buttons that link to the page and not where I am trying to make it go.

Go hover around my menu and see what I mean.

You can probably tell what I am trying to do, but I would like the parent page button to not be click-able if a sub page is present.

Thanks in advance!