Seems a bit crazy - I am at the bottom of ZP Cat B FTP (3.21wkg), your ZP Cat C FTP is 3.04 wkg. Looking through your history (6 months or so), we are fairly much the same throughout the power curve but you have a few kg more to carry so your pure watts are a bit higher, but your previous performances dont count as they only look at the past 60 days (unless you have a bunch of personal rides/training sessions that blow away your official ZP numbers). So no way those numbers suggest Cat A from what I can see.
Here’s the announcement thread where one of the riders has explained how the numbers work. Might be insightful …
If you dont already, hook your data results into Intervals which will provide some CP estimates that relate to this thread.
Hopefully some of the ppl here that know the intricacies of the new system will chime in with some insight for you.