Yeah I contacted Scottish power and they said it’s a mistake. It will take up to a month for the meter to reflect what’s really the rate, I’ve to just do meter readings manually and then it will catch up. That solves the mystery!!
(I work in software, and we work often with Scottish power. It’s going to take a lot of restraint at work not to email someone over at Scottish power and ask who does their software! We’d be in a lot of bother if our software took up to a month to communicate properly with their devices! So strange but if customer service says not to worry then I guess it’ll be okay.)
@rachelmcc Thanks for the 'solved' tag, and if you know people in the IT department please do us all a favour and tell them how things are. It is clear from the Community that the app, website and IHD configuration are not managed well, other suppliers don't seem to have such big problems.