[Plugin: Moo Collapsing Archives] Can't include or exclude categories

Apparently I misunderstood this plugin. The inclusion or exclusion works only at the post level. If you leave the year and/or month links active, clicking on a year or month produces an archive list of all posts. It’s not a list of the included categories or one that excludes categories.

To the author of this plugin: Why do the year and month links produce a list of all posts in all categories?

Thanks!