Hi emolstad,
First of all, we suggest you check how many Sponsor Portals are created in the following path:
ISE Menu - Work Centers - Guest Access - Portals & Components - Sponsor Portals.
You may click on them and click "Portal test URL" to have a test then.
Additionally, you can select all the portals and delete all of them, except for the default portal, to avoid confusion.
If you want to create a brand new Sponsor Portal, you can add a new one through clicking "Create" button.
And set up a FQDN domain name to have a test if you want.
P.S.
Another suggestion is to check the policy sets, check which Authorization Profile is active in the Authorization policy,
Be sure the Results/Profile is the correct Authorization Profile as wished.
Hope this can help you.
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