Wont let me access existing cartwheel account

Now the Target app has its Cartwheel app built in, but I cant connect my Target app to my existing Cartwheel app. I use Facebook to log in to Cartwheel and thats not an option on the Target app. Also disappointed because the in-store display says I can get a REDcads prepaid (instead of debit or credit) but its not available in the app or on their website. Strikes me as false advertising...

ElysseW about Target, v9.0.1