Oh, I see… sorry, didn’t understand. Unfortunately, the Separation Preview pretty much always shows CMYK plates. Same thing in Output Preview in Acrobat. In other words, even if there is nothing on those plates, they still show up in the list.

Hm. Is Type > Show Hidden Characters turned on? If so, it may be a “figure space”? See:
https://creativepro.com/list-of-hidden-characters-what-is-that-weird-character-in-my-text.php

Very sorry, Malcom! Our forum software was holding your post (above) since yesterday. I don’t know why it held it. But yes, you did reply yesterday… our software did not let it through.

–david b.

Each page in an InDesign document can have its own size, controlled with the Page tool in the tool panel. Select the Page tool and click the page and the control panel will show you the page. It’s possible that one or more of your pages has a custom size.

Hanging punctuation (Optical Margin Alignment) usually does not put the punctuation entirely out of the margins. It usually just moves a little bit. You can adjust how much with the Size field in the Story panel, but it is very difficult to get the punctuation entirely outside.