aman204 greetings! I see your edits in the new custom.css file, but the changes are having no effect on the problem. I have cleared my cache in Firefox, Chrome, and Safari and reloaded, but both bars still appear. I then tried to add !important to the CSS rule and recompiled less to css, cleared cookies and tried again, but still no effect.
Edit: I am also noticing that now my main navbar appears completely blank (except the site logo) between 768 and 992 pixels. This means the user can not log in via the nav bar. This was not the case earlier today. Were any other CSS value changed?
Edit 2: The navbar appears fine when the user is logged in. Just when logged out, the login button does not appear on mid-range screens as it does on the mobile screen.