A couple of suggestions. The most likely answer is
applications.properties specifying something different to
You are running 2.0.0. How about at least trying 2.0.4 as there
would be bug fixes?
BuildConfig.groovy doesn't look like the authoritative source. e.g.
tomcat is specified as 2.0.0 specifically so you don't have the typical
upgrade problem, where in 2.3.x these plugins moved from $grailsVersion.
Check application.properties. The grails version in there will be 2.0.0
- can see this from the startup. The tomcat and hibernate versions may be
specified here as the versions you see in the startup.
grails clean and/or delete .grails directory in your home