Regardless of your terminology, Ezboard owners were called EzOps, Ezboard admins were called Administrators.

Ezboard: EzOp- the person who 'owned' whether the one who created it or the one who the ownership was transfered to
Yuku: Owner- for a migrated board, the person who was EzOp, not administrator.
Ezboard: Administrator- person given rights to modify board and manage members
Yuku: Administrator-person given rights to manage members and/or modify board.

EzOp officially, for Ezboard, is the person who was listed as the owner. Owner and EzOp are not separate things.