Your currently installed instance is at version 13.0.4466.4 (2016 SP1-CU7-GDR), and your installation media is at a lower patch level for the same major version (in your case, 2016 SP1, without the CU).
When you install an additional component (Replication, Full-text search, etc) with install media at a lower version, the installation will succeed, but those components will be unpatched. Essentially, the database engine & previously installed bits will be at one version (SP1-CU7) and the newly installed bits will be at a lower version.
After installing the additional components, you will want to re-patch the instance to install the CU. This will ensure that all components on the instance are at a consistent patch level, and ensure you have a supported configuration.
Essentially, whether you're installing additional components or a brand new instance, you'll want to run through the same combination of installers to ensure you get the desired major version + SP + CU.