When starting from a complete stop....it shifts into 2nd gear with a rough jerk.

Hello, naturally, being that you have a brand new vehicle that is under a full warranty yet, definitely bring this to the attention to your dealership's service department. If there is a remedy, they can suggest it. It could be part of the vehicle learning its adaptive strategy -- kind of like a "break in" period. Give it a few days, and if the problem remains, definitely seek assistance.