Because HubSpot does not allow you to tag a campaign when a contact is manually entered there will be two campaigns with associated forms for contacts to be entered when they would typically be added to HubSpot by Inside Sales team members.
This will only be necessary for entering net new contacts into HubSpot. Contacts that already exist in HubSpot (via bulk import, manual entry, form submission, etc.) have an original source tagged that cannot be edited.
If you have questions on using this form reach out to Cobalt Iron marketing team.