Numbered list shows text behind text in box

In some cases, when I create a numbered list (I enter 1. then at the end of number 1, I hit enter and get number 2, etc.), some extra text seems to display behind my text. I've recreated the text box, I've copied and pasted from another app that had a numbered list, and I can't get it to go away. Some lists work fine. This one doesn't. Plus, number 1 seems to have an extra space I can't get rid of. Is this a bug or a feature?