judging by the focal length of the camera in your image (294.098) I’m guessing that you zoomed in (accidentally, it’s easy to do) using the camera’s focal length. Focal length changes cause perspective distortion (changes) which you don’t want .
There are two ways to make something larger in the screen with the camera, one is to dolly in (the camera moves toward the object) and the other is to zoom (you change the focal length of the camera).
With the camera Move icon you move the camera left/right up/down with left mouse but if you right click you dolly the camera. With the Dolly icon beside it you dolly in/out but if you right click it zooms, changing focal length – that (at least for me) is where it’s easy to change focal length when you didn’t mean to.
The shortcut keys 1, 2 have the same behaviour.