From what you describe the numbers seem to get rolled even before the sim applies for uni the first time, probably upon loading the game for the first time after installing DU. Only after this set of numbers gets used during the first uni application does the rng list refreshed.
That's just my basic understanding of the process, of course and it's counter-intuitive, but not unusual. A recent example would be FE: Three Houses rolling examination results the week BEFORE the exams, so no amount of loading the exam day will change anything about the results.
