Changes

:''For example, if the Web Page View field is at Level 2 you should only populate the Custom Field IDs section if all the variables listed on the Web Page View are found at Level 2. They can be anywhere at level 2 (on Types, within Dynamic Control Fields, etc).''

If you need to refer to custom fields on other levels or on Contacts, Accounts etc then you should leave the '''Custom Field IDs''' section blank.