Mis-registering answer selections – UWorld USMLE Review

I have noticed that for every 40-question block I submit, I receive an initial score that corresponds to the answers I actually selected. When I log in at a later time, it gives me a completely different overall score for the block and displays that I selected answers that I did not in fact select. This makes it very difficult to track my progress- both overall and in specific subjects. I paid $500 for this service and I expect it to work.
Review by DeafManListens on UWorld USMLE.