I have to use my actual ignition key to start the car. The 'automatic' key fob does not let me start the car.

Hello, You likely have bad batteries in the remote. Look in the owner's manual for the procedure, and change them. This should always be the first diagnostic step when dealing with a smart key issue. If the new batteries do not work, try the spare key (if available) before seeking assistance at an Infiniti dealership.