If you enable Cloudflare for your domain name and set the SSL settings to Flexible, Full or Full (Strict) then the connection between the visitor and the Cloudflare servers will be encrypted. The encryption is done via a Comodo multidomain SSL Cloudflare service will automatically generates for your domain name.
Since your visitors are actually connecting to Cloudflare servers and not to your hosting server, Comodo SSL will usually show in their browser and not the one you have.
If you want the SSL installed on the hosting account to show up instead you must upgrade your Cloudflare plan to Business or Enterprise as currently only these two plans have this option.