Incorrect attribute sets naming

[josecotes]

In the section insertChapterFirstpageStaticContent, the 2 following attribute-sets/variables have the incorrect name, thus throwing an error at rendering:

chapterfrontmatternamecontainer should be __chapter__frontmatter__name__container
chapterfrontmatternumbercontainer should be __chapter__frontmatter__number__container

Here is a screenshot of how the plug-in gets generated (not all the instances):
Screenshot 1

Here is how it should be:
Screenshot 2

I used, DITA-OT version 2.4, XSL formatter AntennaHouse, And yes to Override shell.