first of all, I want to say that I've read many threads to this topic and tried different suggestions to solve this problem but I did not succeed.
I still got this warning while compiling:
destination with the same identifier (name{page.2}) has been already used, duplicate ignored<to be read again> \relax l.31 [2]) [3] [4
My document is of type \documentclass[twoside, openright, 12pt]{book}. It has an unnumbered title page followed by an unnumbered blank page. Then I have i, ii, iii, iv and after this pages 1 to n.
I first got the problem after I copied some LaTeX code from another project into my project, so I thought the problem is about things like \cite. But then I figured out, that it also occurs when I simply write text. The warnings point to my empty lines. Is it possible that there is something wrong with my line breaks (double enter)?
I use a template of my university, there are many \usepackage and other commands. I don't know if I should post everything?! Tell me which information you need.
I include hyperref like this:
\usepackage[plainpages=false,pdfpagelabels]{hyperref}
\hypersetup{
pdftitle={ein interessantes Thema},
pdfsubject={Bachelor-/Studienjahres-/Master-/Diplomarbeit},
pdfauthor={Max Mustermann},
pdfborder={0 0 0}
}
(As you can see, I use the parameters plainpages=false and pdfpagelabels.)
I would be very thankful if someone could help me solving this issue!
Lukas
EDIT:
But there is a further problem I thougt it was related to this topic: When I make paragraphs in my text, I expect them to look like this:
This is the case in some situations but in some other cases it looks different:

Where does the spacing come from?