Archive Page Title Not Working

I’m using the plugin on this test site I’m developing: https://hope.revolt-designs.com/

In the settings I’ve set the Archive Page Title to “Messages” but the title shows up as “Sermons” and it won’t change no matter what I do.

The issue can be seen here: https://hope.revolt-designs.com/messages/

https://www.ads-software.com/plugins/sermon-manager-for-wordpress/