The Course Total calculation for the first student is correct.
The Course Total calculation for subsequent students is incorrect; the calculation for the first student is repeated.
When displaying the User Report for individual students, the Course Total calculation displays correctly.
This appears to be an error but do let me know if I am missing something.
I would suspect some kind of a local bug.
I cannot replicate that on clean install of 1.9.8+ (Build: 20100407)
I am having problems with the user report. I cannot see any of my students in the group I am assigned to. Even though I see them in the gradebook.
I'm seeing the same problem - it seems to have something to do with hidden items in the gradebook.
I can reproduce it consistently with a hidden category - if you hide a category and choose All Users for the user report then all of their course totals will be the same as the first user.