I went back after many years to finish my degree, with only a limited amount of time and money to do it. Pissing about and wasting time was not an option. I ended up having to take three courses for very dubious reasons.
Two of these were because between the time I left and the time I returned to school, some worthless piece of shit in the state office decided that this particular topic needed two semesters, whereas I had done it in only one years before.
The third was because the satisfactory, 4.0 completion of another course years before simply did not appear on my transcript. I have my class schedules, I have the coursework I finished, but it wasn’t on the transcript. I had to do the entire goddamn thing over again.