Cannot Remove Gray Outline from Around Type

Hi. I'm working on a design for a business card in Illustrator CC 2017. A gray stroke or outline appears around all of my text, and I can't remove it. (Definitely want it gone.) I've been using Century Schoolbook Bold at 12 pts, but the problem occurs with other fonts, too. I imagine the fix is probably really simple and I'm just overlooking it; still... very annoying. I haven't applied a stroke to the text (stroke is set to none); anti-aliasing is turned off in Preferences; and I don't think I've applied a fill twice. Also, if I export to Save for Screens (Legacy) or Export for Screens, the saved image still shows a gray outline around the text.

Help would be appreciated.

Thank you.

Screenshots below:

Header 1