Group Policy Preference Processing Order and Priority

When using group policy preferences we understand how to set the processing order within a single area for example within the 'Drive Mappings' section of GPP. However, we have some questions around the following:

1. When a single GPO defines GPP settings in more than one area (for example drive mapping and internet options' how is processing for the areas ordered? It seems like it orders them in terms of the GUIDs for the CSEs listed here HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\Winlogon\GPExtensions.
2. When multiple GPOs define GPP settings in the same area (Internet Settings for example) how is processing ordered across GPOs? Does it follow the same ordering as standard GPO?