The sorting function is not working in the microRNA labs. It is not reacting nor sorting the designs as usually. Nothing happens. It is working fine for all the other labs, just not this lab with its 3 sub labs:
http://eterna.cmu.edu/web/lab/5489439/
It is the most most crucial lab tool for finding close to identical designs and aid analysis. Especially now when there can be like 1000 designs per lab.
For those who has not yet been introduced to the sorting function, check the description of this lab tutorial puzzle: