I know, this isn't exactly the topic for this site, but I need to fix my sister's website before we can get someone to redesign it for plain old HTML.

Here's the situation: I'm moderately experienced at using WordPress, though not at designing with it. I'm trying to help my sister out with her site at http://aflowerpatchonline.com/

I added a category called Front office to the sidebar menu on the right. I also added it to
Posts - Categories.

The arrangement items on the site are each setup as a blog post, so by assigning categories, they appear on pages in that sidebar menu. But something is apparently missing, to getting the posts to show up on that page now.

I added the code:
<li><a href="/front-office">Front Office</a></li>
to the sidebar.php too.

I also added that code to the header file where that same list is, too, but it doesn't work.

What did I miss, or what am I doing wrong, please?

I see a Front Office. Try Ctrl + f5.

Huh?

OK, I looked up Ctrl F5 and it's a hard page refresh at the site. Didn't change anything.

Looking up Ctrl+ f5 wont do anything you actually have to hit the keys on your keyboard.
I still see a front office.

Very astute Eric, but on that page, Front Office, I cant get the content of some arrangements to go in there. Notice the "not found"?

Can you tell me the exact php code that your using to try to bring data into that page at that location where it says not found?

I have no idea. I don't know what I'm doing with this. The site was setup by a designer, I've just done some things and maintained it, changed some of the colors and content.

I tried adding this page. I put it into the sidebar menu and menu stuff in the header. I added it to the categories for the blog posts that are the merchandise. I have no idea what it takes to get it to work or why it doesn't.

What's suppose to be in the area where it says Not Found?

Arrangements, like on the other pages. They're done as blog posts. For example, if we look at http://aflowerpatchonline.com/designer% … 9s-choice/
there are arrangements for sale there. Each page uses a template called Store and has No Parent, according to what I'm seeing. Then the blog posts, for example there's one called the Love Bear Arrangement, have Categories that tell them what page to appear on. I created a category called Front Office and added that same Love Bear arrangement to that page too, that way, but something isn't set up right and it won't appear there.

If I got to the Designers Choice page and view the source code, I see the posts showing up as arrangements there:

<div class="post" id="post-433">

<div class="entry">
<h3><a href="http://aflowerpatchonline.com/fall-centerpiece-with-candle/" title="Fall Centerpiece with Candle" >Fall Centerpiece with Candle</a></h3> <!-- title of the post as a link -->
<p><a href="/wp-content/uploads/2011/11/HOL002.jpg"><img class="alignnone size-full wp-image-434" title="HOL002" src="/wp-content/uploads/2011/11/HOL002.jpg" alt="" width="200" height="150" /></a></p>
<p align="left">Lovely mixed of fall toned flowers with fall leaves, wheat, and candle in a centerpiece design.</p>
<h4 style="padding-top: 5px; font-size: 18px; text-align: center;">$45.00</h4>
<p>&nbsp;</p>
<!-- adds the content to the post -->
<p class="postmetadata">
<br />
<a href="http://aflowerpatchonline.com/fall-centerpiece-with-candle/#respond" title="Comment on Fall Centerpiece with Candle"> </a> &#124; <a class="post-edit-link" href="http://aflowerpatchonline.com/wp-admin/post.php?post=433&amp;action=edit" title="Edit Post">Edit</a>
</p>
</div> <!-- end entry class-->
<br/><br/>
</div><!-- end post class-->

But this is not getting into the Front Office page I created and I don't know why.

Are you viewing the source code in the html editor of the actual site downloaded to your pc or as the right click on the webpage view source?