[resolved]Troubles with column (type) database in Grocery

[eluser]Unknown[/eluser]
Hello there,

I am a young developer who uses for his project:
CodeIgniter (Version 2.2.0)
Grocery Crud (Version 1.4.1)

I meet a curious troubles:
In fact I created a low data (phpMyAdmin) as follows:

columns: id, number_serie, title, happy

My worry is that if the number_serie column is defined as an integer (int) (13)
So all my recordings have the same number even if a different number before editing it!
But if number_serie are defined as varchar (13) then all works well.

Any idea?

thank you in advance to everyone

Sorry for my english, I'm french.

edit :
concerns set
My data entry exceeded the type
So I went to the bigint