Simple as your LE setup is obviously configured to set display rate the same as the video frame rate (recommended setting). Easy to rectify and a one off operatioon. Just go through all the refresh rates for your chosen resolution and calibrate your box to the TV screen for each and every refresh rate. There are several of them with KODI 17 as we now have all the fractional rates too. I of course also had that problem y ou mention but of course now it is fixed. If you decide to use a different resolution liek changing from 1080i to 1080p then you will need to do the same again as I understand it but I just stick to 1080p on my FHD 5 year old Samsung Series 7.
I had an impression that screen-size calibration is only last resort fix because it will distort the image in the worst possible way (crop-resize). He obviously have problem with overscan, which is a TV problem not a S905 nor LE. All he have to do is to made TV works in 1:1 pixel mode. Ie. on my Samsung UE46F6650SB I had to change HDMI label to PC, problem fixed.