Display of Category Pages

I installed the Wiki Category widget in the sidebar. Category list displays fine. Clicking the category link yields a page listing the posts in the category (the expected behavior).

Problem: The heading of the page is always titled "Archive" followed by a link "Uncategorized" and then the article list beneath.

## What I'm actually seeing ##

For the URL like:
mysite.com/wiki/categories/development/

Then I see:
<h1>Archives</h1>
Uncategorized which links to the normal post type, not wiki
<h2>First wiki in the category</h2>
... more wikis

For the URL like:
mysite.com/wiki/categories/operations/

Then I see:
<h1>Archives</h1>
Uncategorized which links to the normal post type, not wiki
<h2>First wiki in the category</h2>
... more wikis

## What I would expect to see ##

For the URL like:
mysite.com/wiki/categories/operations/

Then I would prefer to see
<h1>Operations</h1>
<h2>First wiki in the category</h2>
... more wikis

Question: Is this the current expected behavior, or is this a bad reaction with my theme? If this is your current expected behavior, 1. it's not good (there's nothing to orient the user as to where they are in the site), 2. is there any workaround or method to change the behavior?