Can I alter the swag?
We cannot give you instructions to alter the swag in width or depth. To go beyond the sizes given would require the shape and size of the pattern and the pleat angles to change. There is no formula for a quick fix.

Your description says, regarding Swag B in this pattern, that the depth “varies from 25” to 24”. Is this a mistake?
No, that is not a mistake. It is written that way to correspond with the width size. When it hangs 16” wide it will be 25” deep. When it hangs at 24” wide it will be 24” deep.