ServiceManager returns same Instance while shared = false - dependency-injection

Question

I defined an alias for MyClass that I want to be retrievable via ServiceManager, see module.config.php example below. When I retrieve an instance of MyClass in my controller via $this->serviceLocator->get('MyClass') I get a new instane the first time, and then the same instance. Do I miss something in my configuration or should I file a bug?
module.config.php
return array(
'di' => array(
'instance' => array(
'alias' => array(
'MyClass' => 'Some\Namespace\MyClass',
),
'MyClass' => array(
'shared' => false,
),
),
),
);

Answer 1

As my edit was not accepted, I will answer this question myself. In the end I moved to ServiceManager thanks to Stoyan Dimov who pushed me into the right direction. Unfortunately his answer was not correct. I had to use invokables instead of alias. Here is the correct example:
return array(
'invokables' => array(
'MyClass' => 'Some\Namespace\MyClass',
),
'shared' => array(
'MyClass' => false,
),
);
When I was using alias instead of invokables I got an exception that no service with that name can be is available, which means that aliasdoes not work, there has to be an existing service defined by invokables, factories, services or abstract_factories.
Following the previous example I could use:
...
'alias' => array(
'SomethingDifferent' => 'MyClass',
),
...
With a call to $this->serviceLocator->get('SomethingDifferent')I would receive an instance of Some\Namespace\MyClass.

Answer 2

I don't know about the DI but the ServiceManager expects your to specify shared (false) in the root of the configuration array for the manager. Something like this:
'invokables' => array( // Note that you can use also 'factories', 'abstract_factories', etc.
'Some\Namespace\MyClass' => 'Some\Namespace\MyClass',
),
'alias' => array(
'MyClass' => 'Some\Namespace\MyClass',
),
'shared' => array(
'MyClass' => false,
),
See the ServiceManager example configuration on the manual
Hope this helps :)
Stoyan