only the first value is reset in controlled field for "Reset untriggered fields to default values" setting

Hello,

With the latest 6.x-2.x-dev there is a major bug where only the first value in the controlled field is reset when the controlling field is unchecked and node form is saved (using "Reset untriggered fields to default values" setting)

Please refer to screencast that shows the issue happening:
http://www.screencast.com/users/trupal218/folders/Jing/media/4fdd4fae-3d...

To replicate:
1) create a controller field - text / checkboxes / unlimited / allowed values: A, B, C
2) create a controlled field - text / checkboxes / unlimited / allowed values: 1, 2, 3, 4, 5 => controlled by value A of controller field
3) go to node form, select A, select 1, 2, 3, 4 then save node form
4) go back to node form, unselect A, then save node form
5) go back to node form, select A => you will see 2, 3, 4 are still selected(!) they should all be unselected

Peterpoe - would you kindly look into this issue?

Regards

P.S. I have set the priority to critical as this is an issue that affects usage of conditional fields with default settings.