If I book a trip with a credit card that I only want to be used one time will that card automatically be saved to the traveler's profile?

Yes, if you use a credit card to book a trip in Concur, the credit card information will automatically be stored in the traveler's profile. If you do not want the credit card number to be saved in the profile, edit your profile after you receive confirmation that your booking is ticketed/confirmed and you can remove it from your profile.