Grid Setup option provided at different places serves different purposes, Overview Window provides an option to add grid in the Overview Window as well as in the map however the grid setup in other two places uses the same dialog box and they are linked with each other.
I tested on a latest beta build of Production Mapping 10 SP1 and I found that if you use the Advance option of Reviewer Session Manager to setup a grid it is properly accessed from the Reviewer table properties, but the Overview Window option is not linked with other two options because it is used for a different purpose and have additional option.
Ted,
I agree with your response to Kumar. Consolidating the dialogs for grid use could help the user better understand how the grids are linked to Table/Map/Overview Window, and how they are not linked. I find the current setup confusing.