If you select ALL of the dispositions and run a report on them, you may notice a difference in calls made.
When you mouse over the pie chart, you can see how many calls the dialer made under "Called Once"
Yet if you add up all of the dispositions in the "Display Graph Stats" pie chart option.
You will notice that there are some numbers missing.
This is because the no answers and AMD (Answering Machine Detection) numbers do not show up here.
When you receive your campaign report, you will see those included in your report.