Hi lpierpont,
Are you looking at an original screen or are you looking at a customized screen?
If it is an original screen, when you select an activity from the gird, it will open an individual acitivty. When you finish that activity, you need to make sure that you change the Status of the activity to completed above the area where you type in the comments.
On the original activity that you set the recurring activities, in the area that has the checkmark for Recurring, there is a checkbox in the grid on the row that describes the column (Due Start Date, Due Date End, Assigned To, and Activity Status).
If you place a checkmark on that row, it will place a checkmark on all future recurring activities. Once those activities are checked, and the “Activity Status” is modified on the topmost activity to the status of Completed as an example, when you click on the Update link, that will automatically change the statuses for the future activities to the exact same status of Completed.
I hope that helps.
Ronen