WPMS Dev_Sites Indexing and Domain Mapping Issue

We are currently setup with a WPMS install, Using the Domain Mapping Plugin. For whatever reason the Dev_Sites on this install are being indexed by Google, even though the robots.txt file should be preventing this. Is there any possibility that it is an issue with the Domain Mapping Plugin? It started happening about the same time that the last update to the plugin was released.

I know what your first response will be. When we attempt to update the plugin it Breaks all of the mapping for the entire install. It makes all of our www. domains have an endless loop. Which is another issue all together. Any ideas ?????