First place and build blueprint "A". Then use blueprint "B" and place it on top of what you made from blueprint "A".
The difference is that blueprint "B" contains circuit network wires.
Result:
When placing blueprint "B" on top of what you made from blueprint "A", the circuit network wires are added without taking any from inventory.
Expected result:
When placing blueprint "B" on top of what you made from blueprint "A", the circuit network wires should be placed as ghosts, not actual wires that work.
Blueprint A
Blueprint B