I just tried creating a new resnet from scratch again and it is a tedious process. Surely this can be improved? Anyway, at least I had the other pin table columns visible this time and I copy&pasted the first two pins into the other added rows and then edited the pin number and unit.
Or, if it has more or fewer parts, “save as” the whole 4 part array with a different name, then open part A (or others), right click properties, change the number of units and the correct result just happens. The only additional work is assign pin numbers to the extra resistors in the array.