Text can only appear on photos after you export them. Since you say "I have not exported them yet", I guess I don't understand your situation. Could you explain further what you have done (the exact steps) and exactly where you are looking in Lightroom that you see the text? Or better yet, show us a screen capture.
I suspect when you were testing, you had 'Add to Catalog' ticked, so the newly generated files with the watermark came back into Lightroom. The original unmarked files could well be there with them, but as DJ says, do a screen capture or a video of the folder so we can see.
Thanks for your help (both of you). I was wrong...I had exported them. When I tried to go back to 'fix' my question, I could not. I figured out my mistake, and what to do from that point on. Thanks again for your help!