Hi again!
I have found something interesting, Is possible that day limit fixed in OBB8 always refer to Entry Date??
I refer to this field.
I have made this test. All tests I have made today (01/11/2015) fill due date 03/25/2015. Then I have change this "Day limit" to 17 and the same test (same document) fill with due date 03/10/2015.
It will explain why all my tests done at the begining of this post ( 01/08/2015) taked due date 03/10/2015.
In case of that I will finally find an explanation of this behaviour but, Can I configured this Day Limit to consider Document day (for example)
I believe I'm close to the solution, I only need a bit of help to confirm what I think.
Best Regards and thank you very much!