How does console.log work?

First Example:

In the following example: http://jsfiddle.net/maniator/ScTAW/4/
I have this js:

var storage = (function () {
    var store = [];
    return {
        "add": function (item) {
            store.push(item);
        },
        "get": function () {
            return store;
        }
    };
}());

storage.add('hi there')
console.log(storage, storage.get(), storage.add('hi there #2'));

And here is what gets printed to the console:

Object ["hi there", "hi there #2"] undefined

One would think that the console should only say:

Object ["hi there"] undefined

becase the second push did not happen until after the value was logged, therefore it should not be displayed.

Second Example:

In the following example: http://jsfiddle.net/maniator/ScTAW/5/

I am using the same storage variable but I log like so:

storage.add('hi there')
console.log(storage, storage.get(), (function() {
    storage.add('hi there #2');
    console.log('TESTING');
})());

What gets printed to the console is:

TESTING
Object ["hi there", "hi there #2"] undefined

hmmmm well that is odd now isnt it? One could expect to see:

Object ["hi there"] undefined
TESTING

Why is this happening? What is going on behind the scenes of the console logging mechanism?