My son (a current UW-Madison freshman) changed his 2nd semester high school English class from a Lit class to a Creative Writing class. He emailed UW-Madison admissions in May and provided a reason why he changed his course. Here's part of his email:
"I substituted a class with more emphasis on writing skills, in order to become even better prepared for college. The class is called "Advanced and Creative Writing".
This is the response:
Thank you for contacting the Office of Admissions at the University of
> Wisconsin-Madison. We have received your email regarding your course
> change and have printed it so it can be added to your application file.
> If you have any further questions or concerns, feel free to contact us
I think it is okay to change your class as long as you provide a logical reason, and as you stated, you still have 4 other weighted (AP or Honors) classes.