When you update the holiday allowance and carryover limit in an existing working pattern, these changes will only apply to staff members who are assigned to the working pattern after the changes are made. 

Anybody already assigned to that working pattern will not have their holiday allowance and carryover limit updated. If those already assigned to the working pattern should have the new holiday allowance and carryover limit applied to their profiles, you will need to update this in their profile settings.