Question about buffer codec encode/decode number

Hi, I wrote the following code

var buffer = Ti.createBuffer({
        length : 1
    });
    Ti.Codec.encodeNumber({
        source : 152,
        dest : buffer,
        position : 0,
        type : Ti.Codec.TYPE_BYTE,
        byteOrder : Ti.Codec.LITTLE_ENDIAN
    });
    var value = Ti.Codec.decodeNumber({
        source : buffer,
        type : Ti.Codec.TYPE_BYTE,
        byteOrder : Ti.Codec.LITTLE_ENDIAN
    });
    Ti.API.info("buffer 0: " + buffer[0]);
    Ti.API.info("value: " + value);

buffer 0: 152
value: -104

var value = Ti.Codec.decodeNumber({
        source : buffer,
        type : Ti.Codec.TYPE_INT,
        byteOrder : Ti.Codec.LITTLE_ENDIAN
    });

I thought that decode with same type as enconding should be work.. Where am I in wrong?

thank you