Register 1 should be the LAST session closed. You can see which registers have an open session from the Point of Sale Dashboard screen.  If a register says "Continue Selling," it means it has an open session.  Cutting Counters 1 and 2, along with the Receiving Station (storeroom computer) and Shipping Station (Sandra's office), should be closed first.  Then Register 2 should be closed, and if any cash was taken in on Register 2, that cash should be removed from the Register 1 drawer BEFORE Register 1 is closed.