Why is Pages changing the font within a document?
I'm working in a Pages doc and recently have noticed that the font - Times New Roman 12pt - sometimes changes to Arial 11pt or 12pt without my initiating it. It happens sometimes when I'm deleting text or copying and pasting. It didn't happen until recently, and it may be because I'm working on a doc that has reached a high word count (108k) that I don't normally reach. I've heard of MS Word getting buggy after 100k words, but this is new to me. Pages is ordinarily very reliable, but for the past couple weeks this has begun to happen several times a day now (I write all day). It may have coincided with the doc reaching 100k words. Truthfully, I don't see any rhyme or reason to why it may be happening. My only guess is that I sometimes am writing new text in places where there once had been comments added that are now deleted (and comments are not in Times New Roman), so maybe an old command is still lingering somewhere?
What makes it more infuriating is that simply changing the font for the whole document doesn't work - doing a mass Times New Roman 12pt switch for all of it. It wants me to select regular or italics, and I am using a mix of both, so I certainly can't uniformly make it regular or italics for the sake of making it all Times New Roman. So at the end of this 120- or 130-page document, when it's done, I'll have to hunt down the Arial font and change it. Pages is also making it so that I'm forced to highlight only those words that are Arial, and not even include text near it that is Times New Roman. It's seriously irritating.
Has this happened to anyone else? What can I do to fix it? Very mysterious because I simply never use Arial, ever. I don't know where this ghost font is coming from. It's not as if I was working in Arial, or copying text that had been in Arial. I have to use Times New Roman 12 pt for my work, and I never use anything else.
Could it be because in other applications, like Safari or Chrome, I've copied and pasted Arial?
MacBook (13-inch), OS X Mountain Lion (10.8.4)