Signed integers over i2c - new try. Not working.

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My code from slave side:

#include <Wire.h>
 
 
const int analogInPin = A0;  
const int led = 9;
int sensorValue = 0;        
int outputValue = 0;        


void setup() 
{                
  Wire.begin(2);              
  Wire.onRequest(requestEvent); 
  pinMode(led, OUTPUT);     
  Serial.begin(9600); 
}


void loop() 
{
   sensorValue = analogRead(analogInPin);            
   outputValue = map(sensorValue, 0, 1023, -100, 100);  
 
 // analogWrite(led, outputValue+100);           
 // print the results to the serial monitor:
  Serial.print("sensor = " );                       
  Serial.print(sensorValue);      
  Serial.print("\t output = ");      
  Serial.println(outputValue);   

  
  digitalWrite(led, LOW);   // turn the LED on (HIGH is the voltage level)
  delay(500);               // wait for a second
  digitalWrite(led, HIGH);    // turn the LED off by making the voltage LOW
  delay(500);               // wait for a second

}

void requestEvent()
{

    Wire.write(highByte(outputValue));
Serial.println(highByte(outputValue));
    Wire.write(lowByte(outputValue));
Serial.println(lowByte(outputValue));
  }

I see in terminal:

sensor = 1023 output = 100
0
100
0
100

Or if i turn pot close to zero:

sensor = 0 output = -100
255
156
255
156

I don,t understand, why i see 4 byte, not two in control section....

I2C Master code is:

#include <Wire.h>
#include <LiquidCrystal.h>
  int data = 0;

  LiquidCrystal lcd(10, 4, 5, 6, 7, 8);

void setup() 
{
  
  lcd.begin(16, 4);
  lcd.print("hello, world!");

  Wire.begin();        
  Serial.begin(9600);
}

void loop() {
  lcd.setCursor(0, 1);
  lcd.print(millis()/1000);

 
Wire.requestFrom(2, 2);    
byte i = 0;
byte buffer[2] = {0, 0};
       while(Wire.available())    
  { 
  i++;
Serial.print("i=");
Serial.println(i);
    buffer[i] =Wire.read();

data = 0;
data |=buffer[1] & 0xFF;
data =data << 8;
data |=buffer[2] & 0xFF;  

Serial.print("Data=");
Serial.println (data);
}


  lcd.setCursor(-4,3);
  lcd.print(data);

  delay(500);
}

I see in terminal:

Data=-25345
i=1
Data=-25345
i=2

But -25345 not equal - 100 !

Whats wrong with my code?