My b2evolution Version: 1.9.x

I am having trouble getting requests to my blog's base url to display the default blog using a stub file.

Here's what I have:

Requests to baseurl.net display the All blog.

Here's what I want:

Requests to baseurl.net display the All blog as specified in a stub file.

Here's what I did:

I created a stub "limit_all" that uses blog 1 (All) but excludes some categories. The default blog is set to All blog. In the All blog settings, I chose the option of using a stub file named limit_all.php.

The links in the bloglist correctly point to the limit_all stub, and the stub displays the right info.

What doesn't work is that requests to the base url go to the All blog - not the All blog modified by the stub file (or put another way, the All blog displayed using the stub file.)

I have fixed the problem by setting up the server to redirect baseurl requests to the stubfile url. But, I don't think that's the way it's supposed to work. Moreover, it's one more thing I need to remember when I set this up again.
I'm using 1.93