Two observations worth mentioning

[Castellon]

The first is WAD
for the other
This is the tech support forum, not a bug reporting forum.
Please follow these instructions for reporting bugs.
As outlined in this sticky thread.
http://forum.paradoxplaza.com/forum/showthread.php?t=179636

 

[Castellon]

WAD = Working AS Designed
Which means it will not be changed and is not considered a bug since it was designed that way.

 

[Castellon]

I don't recall Johan's explaination but just chalk it up to gamebalance and ease of play. Note months do not have 31 days either. So every month is 30 days

 

[Castellon]

Fp

 

[Castellon]

Pretty much covered by my ease of play explanation.