So many problems continue to crop up

This system never seems to work. I have invested hundreds of hours in this plugin and it never works right. It has caused me to look very bad in front of my clients.

Current problems:

1. Students can't login here just spins and spins then a blank white page

2. Selected multiple choice correct answer selection just seems to disappear. The answer stays but the selection of the correct answer is gone. This seems to happen when clicking and dragging (reordering) test questions.