Need clarification on how uniqueness of a machine name is considered in this module

Installed this module and below are my observations. Note sure if they are considered as bug or not. Please review:

Downloaded 7.x-1.x-dev version (7.x-1.0-alpha1+4-dev)
Installed the module on a new instance of Drupal 7.14

Scenario 1:
If content type A has a machine name 'mn_zero', then the same manchine name can be used in content type B
i.e., machine name is not unique b/w content types.

Scenario 2:
Consider content type A.
If a node is created with machine name 'mn_one', then we cannot create another node with the same machine name.

Scenario 3:
Consider the same content type A.
In field edit settings, select "Number of values" to 10.
Create a node and enter the machine name as 'mn_two' for all the 10 fields. It accepts.

Scenario 4:
Consider the same content type A.
Enter the machine name as 'mn_one' (this was created in Scenario 2), it throws error saying it is already used.

Scenario 5:
Consider the same content type A.
In field edit settings, select "Number of values" to "Unlimited".
Create a node and enter the machine name as 'mn_three' for few and 'mn_four' for few fields. It accepts.

Scenario 6:
Consider content type B
Add 2 or more machine name cck fields
Create a node and enter the machine name 'mn_five' in all the fields. It accepts.