Stephanie,
Which version of
Moodle are you using?
As far as I know, you
have to actually go to the edit settings page of each activity in the course
and change the grade there for the overall activity. There have been some
recent changes in the grade book in 2.8, but I am not seeing the ability to
change the maximum grades in there, even though it looks as if you could.
So go to the activity
itself, then look for the Administration block and look for the edit settings
link. This will take you to the edit settings page for that activity.
Change the grade section to the total points you want and save your
changes. When the changes have been saved, they will then show up in the
grade book.