Board Thread:Support Requests - Getting Technical/@comment-2020924-20141117031004/@comment-452-20141117144514

Since you specifically mentioned "manually edited", then yes, there is another way: http://dev.wikia.com/wiki/MassNullEdit

Your choices are:
 * Manually edit. (Either a content-edit or a null-edit without changing anything)
 * Use a script to automatically edit.
 * Wait for the cached page to be rebuilt for some other reason.

I've been adding some categories via templates myself very recently, and have noticed that they do sometimes appear by themselves, hours after adding the category to the template. (I received an email notification when each one was added, due to following the category)

However, it's probably best to use MassNullEdit to be sure. One useful thing to do is to launch MassNullEdit from Special:WhatLinksHere/Template:(yourtemplate) - which will auto-populate the list with the pages which use the template.