[Fixed]-Bootstrap navbar inconsistent height when logged in Django

Looks like you get the problem because of the next two things:

1. navbar-right class used twice in user.is_authenticated block. This class is used to set the position of navbar. To make other elements float right you should use pull-right class. So, try to delete this class from the form.
2. Moreover, why is <ul> wrapped with the form? Form is just a part of your navbar, so it should be inside the navbar. I’d recommend to use a <div> as a navbar holder in your case and to place <ul> and <form> (if you need it) inside it.