Application Settings Table N° 2

Hi,
Just notice a strange behaviour for the "Application Settings" module.
Changing a Table Layout/Size on a normal Browser our table "xxx_tablesettings" is updated (for me) the normal way. In the table "xxx_tablesettings" I found the right Tablename (in this case "xxx_annuaire") and in the Search column everything need by the web application.
Trying the same page on a (in my case Iphone) smartphone, I changed the display for some columns .... and in the "xxx_tablesettings" you will find than a record with a tablename with has nothing to do with THIS page.....
Is this a known bug, or have I missed somethings

Thanks for any help

Yves