Trying to understand camera projections and game screen size

Hi,

I have a question about the camera projections and game screen size. I am using defold orthographic camera asset and have set my game window as 720 x 1280 in the game.project display settings.

To visualize this size in the editor, I always add a gui_node so that I can see the boundaries of my screen. I then placed 2 tiles at the top left and at the bottom right like so:

but when i play the game, these window sizes are not respected, this is what it looks like in the game:

I am using FIXED_ZOOM projection with a zoom of 1.

I expect the game to open and play in a 720 x 1280 window and see my objects placed exactly where I placed them in the editor, but that does not appear to be the case

if I use FIXED_AUTO projection, the window looks like this:

the tiles are still not in the right positions and the blue tower should not be visible

The camera gameobject position is at the centre of the screen i.e. 360 x 640

Understanding this will really help me in my level design as I design a map in Tiled according to my display resolution but when I import it into Defold, the map does not look like it does in Tiled due to the above reasons.