Hi Marla -
You can not add the same form multiple times to an object.
If you added a second form that contains the same custom fields as the previous form, the fields will all update to the same values. Essentially, Workfront only stores a single value for a custom field on an object.
To capture different answers you would need to utilize different custom fields on the form.
(I would be curious to know what it is you are trying to accomplish by using the same forms and fields)