What say the following?
ls -l /etc/letsencrypt/live/aiyotta.com
ls -l /etc/letsencrypt/archive/aiyotta.com
I strongly suspect that the problem lies with the symlinks in your live directory pointing to your old certificate and private key.
Try running this:
certbot update_symlinks
Then run this again:
certbot certificates
If all looks well, reload your webserver:
nginx -s reload