tinker kit continous servo problem

I am using two tinkerkit continous rotation servos with an arduinor3 .When I am connecting one "tinker kit continuous rotation servo" to his UNO R3 board, the servo spins in both the directions. However when two servos are connected with the same code, both the servos rotate only in one direction. Also when two servos are connected, the servos will rotate, stop and then wait for a sound from the computer, to continue the rotation in the same direction.

Code entered for this is as follows:

#include <TinkerKit.h>

#include <Servo.h>
#include<Servo.h
Servo oneServo;
Servo twoServo;
int delayTime = 2000;

void setup() {
oneServo.attach(O1);
twoServo.attach(O3);
}

void loop() {
oneServo.write(180);
twoServo.write(180);
delay(delayTime);
oneServo.write(0);
twoServo.write(0);
delay(delayTime);
}

I would like to know the reason for the same and how the rotation of two servos can be similar to the rotation when one servo is connected (ie. rotate in opposite direction)

 oneServo.attach(O1);

Two questions:
Why specify a pin number in octal?
Why attach a servo to a serial pin?

Actually, three questions:
How are you powering the servos, and why aren't you using code tags?

OK, OK, that's four.

Its not octal, is "O1", letter-digit, a #define I assume.

Normally servo issues are due to inadequate power supply, servos can easily
pull around an amp or so each.

MarkT:
Its not octal, is "O1", letter-digit, a #define I assume.

Oops, yes - difficult to distinguish on a phone screen.
Thanks, and apologies.