Forum:University problem (or maybe not)

Hello, I have problem with new university expansion, I send two of my sims (there only two of then in the household) both to the university, they both have done very well and managed to get highest score and all but I encountered some problems later on. When they both went to gymnasium to get their diplomas they god stuck because there were too many sims trying to get inside, I cancelled the action for one of the sims before he even put his robe on and moved him to other door but then I discovered that there is no option to go inside for graduation thing for him, my other sim did wear robe moments after that and in some time he finally managed to get inside, but when he came out he didn't get any extra trait slot (I have read that sims who graduate get one extra trait slot) later they went to their place and a bit more later they left for home, that's where I got massages that they must or can ( I'm not sure now which one was it ) go back for another semester/term but I'm not sure if that's just translation issues ( I have game in different then English language) when they got to their house eventually I discovered that they don't have college diplomas in their inventory and that in "college history" tab (I'm not sure how is it called in English version but when you go to third tab on the left in main tabs, one with college square hat thing, and then you go to bottom tab on the left with rolled up diploma there, I could see icon of the subject my sim studied with its name and the stripe was all filled up (he got all 48 out of 48 in the exams) and it looked like that in the university, shouldn't it change if he finished the actual degree? shouldn't it say that its done and he passed and such? its my first time so I am not sure how it is supposed to look like. Also, when I was sending them to college I picked two semester mode/system or whatever it is called, is there any hard line between semesters? or does it just prolongs time they are in the college? When I first got the info about semester thing, the one when they said that sim can go back or that he has to ( I cant remember how they phrased it) I assumed that they go to home for break or something and then they can come back to continue the degree but when i tried to send them back on the same subject the window said that I cant because they already have been. I am not sure how stuff should look and work in this expansion it is my first time and first sims that I send to college, is it a bug and can this be solved? Thanks for help and sorry that its so long.