Schools were finding this a bit confusing and a new option was added. The school could add a School Name called Other (Core > School > Transferring/Sending Schools). Once this was done a user could select Other under School Name then enter in the school name not listed in the School Name Other field.
The new option does require that the School Name be called Other. For example if add a school using "Not Listed" the user will not be able to get past the school section.