two types of data type for same object with same internationalisation settings but for two different users

I came accross a behaviour where an appian object(integration) accessed by two different users having parameters data type in two different format

Eg: user1 gets the data type format as "mm/dd/yyyy" and user2 gets the data type as "dd/mm/yyyy". Though their internationalisation settings are same and both users are accessing same object . What else could be the scenario for such behaviour?

Above are images from two different users using the same objects.