Hey there! According to ORPAS, your sub-GPA is based on your 10 most recent full-credit courses or 20 half-credit courses counting backwards from your fourth year fall semester. If they can't extract the full amount of courses needed to calculate your GPA, they average out an entire year (for example, your entire second year). This might be the case here, but it would probably indicate that in your GPA calculation. Hope this helps!