Custom Field added to Standard Screen

Hi,

I have added a custom field on a standard screen tcode VA42, this field was added in between the other fields.

This change worked fine in dev and test system, however as the change progressed to a 3rd level on the landscape the additional custom field has moved to the end of the screen layout.

I have verified layout from screen painter in the system that has issue and the field appears to be at the same position as the previous other systems.

Is there any other setting that I would have to change to make the custom field appear in the order I want rather than displaying it at the end of the layout.

Cheers.