Are you trying to power two servos from a 9 volt smoke alarm battery?
Can you try using a 5 volt power supply? A cellphone power bank is a better source, you'd have to cut into a USB cable and use the red (+) and black (ground) wires.
Or you could use 4 AA batteries for 6 volts (servos be fine).
With either 5 or 6 volts you would not need the regulators.
a7