I am in the same situation as your girlfriend. I am a BEED graduate, and I am planning to pursue a degree in nursing. I graduated around 2019, which was the last year of the old college curriculum. By 202, the new curriculum was implemented because that year marked the graduation of the first batch of K-12 students, who also became the first batch to experience the new college curriculum. Due to this change, most of the minor subjects have been revised. If you graduated under the old curriculum and decided to enroll in a second degree under the new curriculum, it is expected to take four years to complete. That was the explanation I received from the registrar when I asked them about it. On the other hand, if you graduated under the old curriculum and pursued a second degree that also follows the old curriculum, it would only take two years. However, with the curriculum change, going back for a second degree now requires completing four years again.
When I reviewed my transcript of records and had it evaluated, I found that only eight of my minor subjects were credited. As a result, I will need to take many of the minor subjects under the new curriculum, along with the major subjects, which is why it will take four years to complete the course.