I want to divide the electrical circuit depicted in figure-1 into three separate circuits (ckt-1, 2, and 3) as indicated by the red box, as well as locate equivalent capacitance for ckt-1 and 3 and connect the equivalent values to ckt-2 (no changes to be done with ckt-2) (as shown in figure-2). I've done the same, but the equivalent capacitance I've obtained is not the same before and after the modifications.

Can anybody tell me where I am making the mistake?