11g and 10g property behaviour difference

Hi,

Recently, we have received new  environments in order to test form application on oracle 11g forms.

There is one descripancy in the behaviour of the application

10g environment (where it works correctly)  

11g environment (where it doesn't work correctly)

When i open form and fill below columns 

 fill column 'Tar No 1-6' with some numbers (in 10g it accepts 6 characeters but in 11g it allows 8, which is the problem

 fill column 'Tar No 7-13' with some numbers (in 10g it accepts 8 characters but in 11g it allows 9, which is the problem)

There are more screens which are facing the similar issue. Wherever maximum character lenght property is set, the AutoSkip doesn't work in 11g and it allows 2 more characters to be entered in addition to max lenght property.