Hi! I emailed them about this and got this reply:
"If you took a natural science course that counted towards your undergraduate degree--whether from a community college that transferred in or that you took at your final undergraduate institution--you should include it. Also, if you took an undergraduate course after graduating that we should consider when reviewing your application (e.g., a course to satisfy the biochemistry recommendation), you should also include it. If you took a course to earn a better grade, use the better grade and exclude the worse grade."
@genmed You can get rid of the lower grade -- they specifically stated that we can exclude it.
Hope this helps!!