Simple Loop issue (From Lynda.com) [solved]

I'm following the Arduino video from Lynda.com and used the same exact example as the one shown on Lynda.com to display numbers increasing it by 1 unit.
The strange thing is that my result is not the same as the one from Lynda.

int seconds;
void setup()
{
seconds = 0;
Serial.begin(9600);
}
void loop() {
Serial.println(seconds);
delay(1000);
seconds++;
}

Lynda's result dislplays 012345.... but mine is displaying 0012345... (repeating the initial 0).
Can anyone help me understand why this is happening?
I really appreciate your help.

int seconds;
void setup()
{ 
  Serial.begin(9600);
  delay (1000);
}
void loop() { 
  Serial.println(seconds++);
  delay(1000);
}

Now?

Just tried but same result.

I don't think there is anything wrong with the code.
I just find it strange that it reapeats the initial 0 (see attached).

Just press the reset button, without uploading.

It works. Thanks!