Wrong cat?

Hi, I’m fairly new to Zwift and this evening I entered into ZHQ FutureWorks Crit City Race - Anti-sandbagging ©. I entered the C category (2,5-3,1w/kg). After completing the race I was really happy with my performance and I reached a new record for me with an average W/kg of 3,1. As this is in the high end of category C I was surprised that I still got beaten by 50% of the participants in the race. Is this how it should be? Am I in the wrong category?

Yep - normal. Excuse can be:

People that just dont give a toss and enter wrong cat
If race under 20mins a good Cat C rider can push higher than Cat limits (this is OK)
Kids kick adults butts on Zwift
Weight dopers

Join up to Zwiftpower.com and only ever care about results published there. Even then, most of above still applies but not to the same extent.