You are renewing your certs just fine. But, for some reason your nginx server is not using any of your newer certs. Maybe you just need to reload / restart nginx.
Or, perhaps you have some other sort of cert config problem. We would need to know more answers to those questions than you provided. Most importantly - how did you get your cert on Mar22. The cert issued Mar22 is the one your nginx is currently using (and expired 6 days ago).
And, what have you done since then to get these 10 more recent certs?