Hello Jim,
I have been having the same problem sporadically since I joined this website 3 months ago. It happens about 2 to 3% of the time. See my comments below, please.

A beseeching to the God of the Polyglots.

Mode of communication between students and staff needs improvement. 

There are 2 types of communication that I use on this website. The first type, questions about grammar, have always been answered most expertly and completely, way beyond expectations. My comments below are about the 2nd type, questions about the accuracy of the results of a quiz. It is the mechanics of communication needed in these cases about which I am commenting here.

1. The editing window in the forum needs some editing capabilities. The most important being the ability to add attachments. This cannot be easily dismissed. When I send a comment on a quiz result, I am always asked where it originates and I have no easy way of describing that and, without that description you are unable to properly respond. If I could take a snapshot of the quiz results and send that snapshot to you that would go a long way towards making this process more fruitful and less painful for both the student and staff. This suggestion really needs to be discussed further.

2. Add some kind of tag or identifier to be displayed in the quiz results page as an index to identify the source when a student wants to discuss quiz results with the staff. Then, you would not have to ask a student where the result originates.. There are simply too many possible places (hundreds of grammar topics and hundreds of quizzes) and no easy way to identify them after the quiz has taken. The fact that I may be the only one who ever makes such a suggestion, which I expect I am, does not mean that other students are not having similar difficulties in discussing quiz results as I am. I would bet my bottom dollar that they are.

3. Allow email as a means of communicating issues that may require advanced editing capabilities.