This is the second time I attempt to play the game and I still have the same problem. It seems that if I complete a quest with a copper or silver marker and I quit the game and then reload it, the quest, as well any other achievements I made, are not saved. I think (not sure) that it does save it only if the quest has a golden marker.
Can you please tell me at which stages of a quest I can quit and actually save the quest (and achievements) regadless of markers colors??
Silver means that it's a sidequest and you did a 'Hero Save' not a 'World Save' which means, you saved your Hero's stats but not any quest accomplishments. Try to complete a sidequest and then go further on with the MAIN quest(Storyline) which has a Gold marker
(If you don't understand what I mean, then I can't help you. I'm really bad at explaining stuff.)