Why am I allowed to enrolled in the subject when all the classes are full ?

[Hannah12]

Hello, I have  enrolled myself in BAFI1014(personal Wealth) and have succesfully enrolled. However, when I got into the timetable site to allocate myself in the tutorial, all the classes are full. First of all, if the classes are full, why is the status icon shows "open for enrolement" and not "F" for full classes? Can someone please assist me in this matter as the last day to add is on 25 July, and it tooks 1 day for the timetable to update.  I have contacted my course coordinator but still havent gotten any reply.  Is this my fault or the system fault for not putting "F". Thank you.