Renaming/Updating Tags

Try editing the slug of your tag from piza to pizza in the source blog, then re-save the post.

Apologies for a late response. Anyway, thanks for the reply.

I tried what you suggested with a test post and it works. However, I now have another question. The tag I used for testing is “TEST-TGA”. I did what you suggested, renaming both name and slug to “TEST-TAG” and “test-tag” respectively, but on the Sitewide blog, the tag is being displayed as “test-tag” instead of all caps.

I checked my code, and I indeed am using the name for display.

...
$tag_name = array();
$posttags = get_the_tags(get_the_ID());

if ($posttags) {
	foreach($posttags as $tag) {
		$tag_name[] = $tag->name;
	}
}
...
...
<p class="content_tags">
	foreach($tag_name as $tag_name_echo) {
		echo $tag_name_echo . ' ';
	}
</p>
...

Also, another question. If I delete this test post I made, will the same post in the Sitewide blog also be deleted?

And I forgot to ask… What if the tag I wanted to edit contains 2 or more posts? Should I update each of those posts individually for the tag change to reflect in the Sitewide blog?

Also, another question. If I delete this test post I made, will the same post in the Sitewide blog also be deleted?

I tried it out anyway. If I go to [Edit], then choose [Move to Thrash], the post in the Sitewide blog also is gone.
If I’ll simply click that red [Thrash], the posts is also gone.
If I check the post’s checkbox, then select [Move to Thrash] from the drop-down menu, and then click the [Apply] button, the post is also gone in the Sitewide blog.

So no problems there then~

And I forgot to ask… What if the tag I wanted to edit contains 2 or more posts? Should I update each of those posts individually for the tag change to reflect in the Sitewide blog?

So I tried answering my own question by creating three test posts… and oh my goodness, I seriously have to update each post that uses the tag I updated! o.o

the tag is being displayed as “test-tag” instead of all caps.

Have you checked your theme CSS to see if it has a text transform to lowercase for tags?

Should I update each of those posts individually for the tag change to reflect in the Sitewide blog?

Yes.