Numbers not displayed properly with Adafruit 's lib for PCD8544

I 'm using Adafruit 's library for PCD8544, a Nokia 5110 LCD screen.

// read packet
while (LoRa.available()) {
Serial.print((char)LoRa.read());
display.print((char)LoRa.read());
display.display();
}

Instead of displaying '1' it displays 'e1'.
Instead of displaying '2' it, again, displays 'e1'.
etc...
Instead of displaying '10' it, again, displays 'e1 0'.
Instead of displaying '11' it, again, displays 'e1 1'.
etc...

What is this 'e1'? Exponential?
What do I do wrong?
Maybe the '(char)LoRa.read()' is wrong?