A brief follow up on this - I finally received a response via email from IT on this, more than 14 days since I submitted the first request (and a week after we had resolved this issue ourselves). Shocking. Of course, since I have already made it past that error, they didn't grasp the nature of the error I tried to explain to them, despite the screen shots. No phone number, and no way to express to them that they are now looking at this in the wrong way - I would have to re-submit the 'case-specific technical problem using the online form', which I can't be bothered to do. I don't see this bug getting fixed on their website anytime soon.