Browsers can be setup to auto fill fields in a record with a value. To determine if the browser is auto filling the field user can switch the browser into private browsing, logins to NetSuite and tests the record. If the field no longer populates the browser is auto filling the field. To resolve the concern the browsers temporary internet files should be cleared and the Add-Ons checked.
Steps to switch a browser into Private Mode:
In Internet Explorer > Navigate to Tools > Safety > In Private Browsing.
In Firefox > Navigate to Open Menu > New Private Window.
In Chrome > Navigate to Customize and control Google Chrome > New incognito Window.