Zwift categories

I did the crit City race this afternoon and early on a message came up that I should be in category C and it was increasing my resistance. I am quite confused about this. I am only 1.52 metres tall and 50kg. I usually go in the D category and tend to finish in the last third of the race. A friend of mine who is male and tons faster than me finished way ahead of me and he didn’t get the message. He also said he tried category C and found it too hard. If I finish towards the end in cat D what hope have I got in cat C.

According to Zwift power you are a D for mixed races, so if that was a mixed race then ignore the result, I would say don’t enter those races, lots of people report being flagged when not over cat limits.