I moved your thread, you shouldn't piggy back your report to another thread that is a separate issue.
I confirm this is a bug. Looks like the config in the constructor is not applied early enough. There's some setup with pagingItems that occurs before the config object is applied to the class so the configs don't get applied.
Gentle reminder: it would probably be helpful (to some) to yank out pagingItems to have some set up method so people could override the pagingItems a little easier. overriding initComponent is more difficult IMHO.