Missing student in a class

My eighth grade class is missing a student. One student is reported as not passing to the next grade. In RenWeb she is listed as 9th grade next year. Did I miss something in my Data Rollup submission?
If you go to the student screen, and select that student, you will see that they have a Withdraw date. This is causing the student to not show as graduating or going on to the next year. Anytime a student returns, who was previously withdrawn, you will want to remove the originating withdraw date, when you enroll them back into your school. Once you fix this, she should be reported correctly in your rollup.