Ok, I tried your code and got it to work.
I am confused a bit though. With only the two <p> tags, how did I end up with four lines?
I understand that the <span> tells the file do something different to what is encased between the span, from what should be done to the normal <p>, but what told it to start a new line? From experiment it is the
display: block
but I am not sure what that all means