Keep getting black lines inside my text area after editing text

Everytime I adjust my text it gets a black line either under the text are in the text. Also when I try to create a bullet point if I keep adding it adds dots above and below the text and when I delete the bottom ones there is no way to get rid of the dots on top. I am starting to think I need to use a different theme there seems to still be alot of bugs in this one. Also there is no easy way to preview the website. Really need help with this was suppose to go live with my website this week and am way behind and these problems are just pushing me that much further back.