Category Order could not understand your category HTML. Please do the following:

• Disable all plugins except for category order to see if some other plugin is causing the problem. If the problem goes away, re-enable each plugin until you find the incompatible one.
• Try switching to a different theme, like the WordPress default theme.

Once you have tried the above steps, email david@coppit.org with the results of these debugging steps. Also include the following information:

Original HTML:
<li class="cat-item cat-item-16"><a href="http://daisuki.weblike.jp/npo/info-cat/press-release/" >プレスリリース</a>
</li>

Processed HTML:
<li class="cat-item cat-item-16"><a href="http://daisuki.weblike.jp/npo/info-cat/press-release/" >プレスリリース</a>
</li>

Category pattern:
/http\:\/\/daisuki\.weblike\.jp\/npo.*?\/category\/(?:[^\/"]+\/)*([^\/"]+)/

Items:
Array
(
    [0] => <li class="cat-item cat-item-16"><a href="http://daisuki.weblike.jp/npo/info-cat/press-release/" >プレスリリース</a> </li>
)