I completed my GCSE’s and A-Levels in Northern Ireland, as you have stated the boxes containing ‘drop down menu’s’ were restricted to a handful of subjects (only 3 of which I had studied for GCSE) and the grading was different.
Because of this, I entered all my GCSE and A-level results in the 3 x 12 table just below that table, I got an email around 16:30 inviting me to take the online assessments. Don’t worry if you haven’t heard yet, with the volume of people that would have applied it may well take a few days.