Any ideas why the first 3 questions on a page would have 1 style (see question 2) and the second 3 questions would have a different style (see question 5)?
My first guess is that there might be some HTML code that was introduced in the Build section.
Was the question text pasted into the Build from another source by chance? If so, you may need to edit the questions on the Build tab and click the … icon, followed by the <> icon to access the source. This would show you any HTML code that might have snuck in when pasting.
Hope this helps!