Code doesn't seem to work when trying to program 2 sensors
As JFPoilpret says you if logic is wrong.
It might make it easier if you took that whole if block out and made it into a function that accepted the value from the sensor as a parameter.

void CheckReading(int reading)
{
    if (reading &lt; 10) {
        Serial.println(" - Nothing");
    } else if (reading &lt; 200) {
        Serial.println(" - Light");
    } else if (reading &lt; 500) {
        Serial.println(" - Lightness");
    } else if (reading &lt; 800) {
        Serial.println(" - Medium");
    } else {
        Serial.println(" - Big-squeeze");
    }
}


Notice that the values only go up to 800, going larger than 1023 won't work anyway.