I was able to fix my error with the checkboxes of field options by changing the field name to the field key like so (for both custom fields):
$field = get_field_object('field_54d4ec8875f85');
$field2 = get_field_object('field_54d4e73975f79');
I referenced this: http://www.advancedcustomfields.com/resources/get_field_object/
Now I just need to sort out how to change the javascript to apply both custom filters. I’ll report back if I figure it out.
