Garbled letters with serial LCD (atlas ph stamp project)

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Thank you for taking the time to reply, I've edited the photos. Forgive my ignorance, but if it's not too much trouble could you show me what you mean so I know how to change the code? I'm having a bit of trouble figuring out how to do it.

Is it this part of the code I need to change:

void calibrate()
{
  //This function calibrates the pH stamp with the current temperature read from the DS18B20 temp sensor
  delay(500);
  pHserial.print(getTemp()); //pritn temp in degrees C to Ph Sensor
  pHserial.write("\r"); //carrage return
  delay(1000);
  clearLCD();
  selectLineOne();//move up to the first line of the LCD
  goTo(4);//Move in 4 spaces on the second line to center text
  Serial.print("Complete");
  selectLineTwo();//move down to the second line of the LCD
  goTo(19);//move in to position 19 to center text
  Serial.print("Temp=");//print the temperture that was used to calibrate to the LCD
  Serial.print(convertTemp());
  Serial.print("F");
  delay(500);