Second Year Entry Watch
I can assure you that this is not a misunderstanding on my part, after multiple clarifications from the university admissions officer.
This seems ridiculous and I am wondering if it would be a good idea to email someone higher up in the admissions process?
I'm sorry to hear about your situation and it does sound quite troubling. It seems as though you are being penalised for taking subjects early, which doesn't make much sense! Universities are usually fighting over those types of applicants, and so I believe that it is a bad judgement call on behalf of the admissions team. Can I ask, which university was it that told you this? It'd help me try and understand how to point you in the right direction.
I'm sure there will be other universities who would take someone like you. For example, Dundee University says that they require AB at Advanced Higher, with Mathematics at an A, alongside AB at Higher. For the University of Edinburgh, they require AAA to include Mathematics with a further science subject recommended. There is no mention of it being over one sitting.
I hope this helps, and I hope you get your situation sorted. There are plenty of universities who would take someone like you, so shop around!