In asking a colleague they said:
I hope this helps!
Hi James, have you tried running with your browser's debugging tools enabled? If you display the console window, it's likely there will be some clues as to why this isn't working.
Using a single select may work but isn't applicable to the need.
The power for the user is to evaluate many situations and criteria and see the differences. If the selection involves something like race, ethnicity or special education, more than one category applies. If it relates to discipline, the user may want evaluate in-school and off-campus suspensions together or separate from twenty other types of incidents.
I am not sure what I'd be looking for in the console window Jeff. The program gives the correct answer in the drop-down, it simply doesn't initiate a click.