I do not think you should use the word “unfortunately” in that sentence. I agree that humans tell the computer what to do, but there must be an absolute correspondence between the questionnaire and the final result. Nothing unfortunate should be able to occur.
The month of November starts tomorrow, and this error occurred in August. You are unable to explain to me exactly what happened, despite the analyses you conducted of the processes to determine the cause of the problem. Three months later, you still do not know what actually happened.