Okay, this is REALLY weird. So, my site is themed around a made-up species simply called "Horned Rats". Naturally, I typed in "horned rat" on several pages...but I went to check my edits and it instead said "hoed rat". So I though I had just made a silly spelling error, and went back and changed it. Saved the page. Checked the page again, and it still said "hoed rat" instead of "horned rat". I checked the other pages, and it's the same. They all say "hoed rat" when instead it should say "horned rat".
Also tested it with the words "corn" "worn" and "pern" and they came out as "co" "wo" and "pe"
So, any idea as to why it's discriminating against the combination of "r" and "n" together..?