I have a problem with my Production Order, I'm surprised that I can still do Goods Issue or Good Receipt when my Production Order have status Teco. 
Why there are no messages at all when this is happened? 

I would like to share some fact about Production Order status. 

This will help you to decide which status you need to be deactivated in a sequence status number.

A status profile is created in customizing per order type.

Within a status profile you can

- Define user statuses and document their function in long texts

- Specify the expected sequence of user statuses by assigning a "status number" to each user status

- Define an initial status, which is automatically set when the object is created

- Specify that a user status should automatically be activated, if a certain business transaction is carried out

- Allow or forbid certain transactions, if a status is active

Now,  for every user status you can define a status number. 

With the help of the status number you determine the sequence in which the user statuses are activated.

If you do not assign a status number to a user status, the user status can always be activated. However, only one user status with a status number can be active at any given time.

If you assign a status number to a user status, you must also specify a lowest and a highest status number for the user status. These limit the status number interval from which the next user status can be selected.

Goto BS42 and change the selection condition accordingly.

Read Also:
Control Regular Entry for Material Consumption

SAP PP Reference Books:
SAP Production Planning , Configuration, Interview Questions and Certification, Books

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SAP MRP - Materials Requirements Planning Configuration Hints and Tips 

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