ok so I figured it all out seems the roms have different versions some are full screen some are not but the roms that are not full screen its an easy fix
in the scrips folder there are .lua files with the name of the games if you create or edit a folder and paste this inside your game will fullscreen
also in the in the model 2 emulator config settings set wide screen window to 2
require("model2"); -- Import model2 machine globals
function Init()
end
function Frame()
Model2_SetWideScreen(1)
Model2_SetStretchALow(1)
Model2_SetStretchAHigh(1)
Model2_SetStretchBLow(1)
Model2_SetStretchBHigh(1)
end