You have done changes in OWL screen and save it as a page layout. You have applied this page layout for some business rule but when you test with an user, this changes are not seen for the user.
You should have saved this page layout using the rule "Business Object + Instance Type + Business Rule". But instance types only works for TI screens, and because it the rule using "Instance Type" does not display the changes for the business users.
You must use the first blank column in the screen "Assign Page Layout" to set which page layout you want apply for the business role. Please see the image below.
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