Stage and Status can be added to an attribute section on R360 and edited from there. Is there any specific reason why you need to be able to edit via the "Edit Summary" option?
Also we should be able to set the formatting option (with currency prefix, decimal places, multipliers etc.) for currency and numeric fields in both C360 and R360 summary section. If you are unable to solve this, then this might be a bug that you are experiencing and we could look into it. You should be able to see the following options.