DisplayNewImage recizing Image when changing simulator view

When i put this code:

function plotaFiguraXY(figura, posx,posy)
 local figuraTeste = display.newImage(figura,5000,5000)
 largura = figuraTeste.width
 altura  = figuraTeste.height
 figuraTeste:removeSelf()
 return display.newImage(figura,posx+(largura/2),posy+(altura/2))
end
fundo = plotaFiguraXY(“testeFundo.png”,0,0)

print(fundo.width,fundo.height)

My image that has 1280x720 get smaller for some reason on some simulated devices.
It works perfectly on: GalaxySIII, KindleFireHD7, KindleFire HD9, GameStick(both), Ouya(both), iPhone5 and iPad Retina. But on all other devices that are smaller than the picture my image changes scale.
I dont use config.lua or build.settings (only main.lua) on this test.
Why is my image auto-scalling!?

this error does not happen on my windows system.

Please someone answer my quastion as quickly

 as possible.

Ps.: I DONT’t have config.lua

corona Build Version 2014.2350 (2014.6.27) MAC

ty
my best Regards

What settings are you using in config.lua?

What settings are you using in config.lua?