Why do I think you're not giving the full truth?
You went 6 hours without saving, because you couldn't save? So either you weren't saving anywhere near as often as you should or you tried to save....couldn't but went "oh well, guess I'll continue anyway!"
And you do know that the game autosaves at least twice per day. So unless you stayed on a certain day somehow for 6 hours which you definitely weren't progressing, your story doesn't add up.
Last two possible things are: 1, your address was for too long so your save errored. 2, you were playing the game through the rar which while is possible it doesn't allow to write new information thus saving becomes impoosible. Both of those are user errors.