serial.write() five sensors of Arduino and Processing

Hi I'm very new to all of this, hope to formulate the question right.

In my project I have 5 sensors connected to Arduino, which I want to interpret via Seria.write() --> Processing.

Arduino:

firstSens = 100 + (155 * digitalRead(8));
secondSens = analogRead(A1)/4;
thirdSens = analogRead(A2)/4;
fourthSens = humData;
fifthSens = tempData;

int sensData[6] = {firstSens, secondSens, thirdSens, fourthSens, fifthSens};

int i;
for (i = 0; i < 5; i = i + 1) {
  Serial.write(sensData[i]);
}

Processing:

serialInArray[serialCount] = inByte;
    serialCount++;

if (serialCount > 4 ) {
  firstSens = serialInArray[0];
  secondSens = serialInArray[1];
  thirdSens = serialInArray[2];
  fourthSens = serialInArray[3];
  fifthSens = serialInArray[4];

  println(firstSens + "\t" + secondSens + "\t" + thirdSens + "\t" + fourthSens + "\t" + fifthSens);

  myPort.write('A');
  serialCount = 0;

My problem is that sensors find their place in Processing's array randomly, so for example arduino's firstSens could be Processing's secondSens or fifthSens

Why is this happening and how can I control it?