And do you hvae one configured for a specific environment in ui.config/src/main/content/jcr_root/apps/<project-folder>/osgiconfig/config.[environment].publish?
Because that would overwrite the more generic one.
Also to verify if your configuration is deployed correctly you can go to the developer console and print all the OSGi Configurations from the publishers and search for your configurations.
Here you have a step-to-step guide on how to get OSGi Configurations through the developer console.