You accidentally enable FLIP in your device settings where you see an orange button.
What does FLIP do?
When you wanna use iseeBell as a Drop Camera, you can enable FLIP and the picture will be displayed as desired. Drop Cam is something like this:
How to recover to a normal display if I only want to use it as a doorbell or security camera?
Simply disable the FLIP where you see a gray button. Select "Back" arrow and the setting will be saved automatically.