that's really odd, the reason android boxes are not normally able to change resolution or refresh rates within kodi is a limitation of android before lollipop that is at least, and many cant do it on that version and up either. so resolution of kodi is fixed at the box' output resolution. or that's what i have seen as said above on all other android boxes, excluding a very few on android 5+ like NVidia shield; but the t1 runs KitKat? right? but you can change the settings in kodi with the nasty issue you mentioned (cutting of the edges) though. strange.