i can only fix 'half' of your problem
when u quit the game thus creating the save point, make sure the save point is a point where u are happy, eg. at the very start of the attract mode (eg. the point just after a reset of the game)
then, change your .sta file in the mame/sta folder to read only, so from then on your game will always start at that save point you are happy with, regardless of when u quit the game in the future