Unexpected warnings from licenses plugin

When building WildFly Core I realized that the license plugin is logging warnings when there is a mismatch between the license name declared on the dependency and the local license name, e.g:

[WARNING] Possible license mismatch for com.googlecode.javaewah:JavaEWAH, check that the configuration files are up to date
Declared licenses: 'Apache 2'
Local licenses: 'Apache License 2.0'

The above one looks good, even if we do not have control over the declared dependency source code, is a good warning that forces us to check whether the processed license is valid.

However, I've also found these warnings which do not make sense at all:

[WARNING] Possible license mismatch for org.jboss:jboss-dmr, check that the configuration files are up to date
Declared licenses: 'Apache License 2.0'
Local licenses: 'Apache License 2.0'

In this case, the declared and local licenses match.