Direct Answer • Key Takeaway
He Knows That They Didn't Betray Him but Albedo (Being an Npc) Is Unable to Comprehend It at All. She's Showing Contempt over the Ainz Ooal Gown Banner, and Worshipping Momonga's Personal Banner. She Was Made to Love Momonga Through Her Settings, So She's Not Really Happy with Him Dismissing That Name.