* NOTE: This is NOT the Custom AP that shows up in ESS. You should never use that. This is for creating your own existing AP and Antenna combinations.
When you add an AP and change the antennas type in Ekahau, the next time you add the AP it will not have the same antennas, or settings. You have to manually edit the AP everytime you add it if it's not a combination that already exists in the dropdown.
You can manually edit the config files for antennas and APs so that you can create custom AP/ANT combos for use in all of your projects.