The registration system is set up so that you are assigned two electives after Round 1 of the registration and a third elective after Round 2. As you are required to complete 3 electives for your programme studies and two of them must be a Master Programme Elective (MPE), the system will display only MPEs in Round 1. 

In round 2 both MPEs and Master Free Electives (MFEs) will be displayed. You will therefore be assigned to 2 MPEs after Round 1 and 1 MPE/MFE after Round 2.

If you only need to take one elective in this academic year, you will only enter Round 2 in order to get assigned one elective.