Not sure what you mean but wildcard certs are more versatile than a cert with just discrete names. But, this only helps when using a large number of names and even a wildcard DNS entry.
You have a wide variety of certs from various Certificate Authorities so I wouldn't want to guess what you should do. Maybe look at the crt.sh public logs and you'll see certs from Let's Encrypt, Google, Cloudflare, Amazon, and DigiCert.
Further, your DNS for plixer.com points to a grouping of AWS EC2 instances whereas filemonster just points to just one IP. Nothing wrong with this it just shows some of the complexity of the system you have.