You usually only see N1 etc in "View Class timetable" yes they are the weeks (odd, even etc)
I wouldn't look at your timetable this way, just look at all your course times (i.e. right below your Class Timetable) and maybe create your own.
But first years shouldn't be worried about n1 etc, since you'll all be attending lectures, tutorials and labs every week. It's only 2nd Year and above students who attend say odd or even weekly labs (i.e. those doing Fundamental courses. Students taking Advanced courses, go to Uni every week for every lab & tutorial)