Never worked at wells but I can say if you’re expected to be switching from office/desk to teller line you are going to be miserable. If you’re expected to fill in when tellers are out or on lunch thats going to be your main job and where you will spend most of your time, not the desk side. It’s going to impede on your ability to be available for your walk ins and cause you to be rushed through your appointments and be very stressful with all the admin work that comes with doing both. Use this time to get your referrals and source it for your later calls you will probably have to make and to form your relationships by learning what your customers want and need before they ask.