stream.Readable emits readable twice

If I set a listener on readable, the readable event fires again after stream.read()

node version 5.12, windows 10

If I read immediately after creating the stream, I get null

stream = fs.createReadStream(inFile);
result = stream.read();

If I read after 200 msec, read succeeds and no further readable events are emitted

function _main() {
    result = stream.read();
}
setTimeout(_main, delay);

If I read in a call-back on the readable event, read succeeds but a second readable event is emitted

    stream.on('readable', () => {
        result = stream.read()
    });

The unsimplified, main code is...:

function main(repeats) {

    console.log(`\n${ESC}${BOLD};${RED}m${stamp()}starting main: ${repeats}${ESC}m`);

    // connect a readstream to the same file
    stream = specs.Stream();

    // try to read it
    if(options.immediate)
        logit(`immediate`, 0);  // null

    if(options.timer)
        logit(`after timeout`, options.timer);  // success, no more readable events

    if(!options["not-on-readable"])
        stream.on('readable', (() => {
            console.log(`${stamp()}setting listener on readable`)
            var count = 0;
            return () => {
                logit(`after readable:\t${++count}`, 0);
                if(repeats)
                    stream.on('close', main.bind(this, --repeats))
            }
        })());  // success, but a second readable event is emitted
    else
        main.bind(this, --repeats);

    console.log(`${ESC}${BOLD};${RED}m${stamp()}ending main: ${repeats}${ESC}m\n`);
}

main(options.repeats);

GIT Repo with complete working example