I had the same issue in regards to where I was started after I saved and quit. I read the FAQ, it does say it will autosave every 10-15 (approx.). However, I found that this is not always the case. I actually got a little further than where you described (I finished the part where the main character is in the belly of the beast) and played a little while after that. When I saved and quit, I found I was set at the point you described. This has happened to me more than once, another instance I had to completely repeat nearly an entire clear of an optional mission. I enjoyed all the Dead Space games, but I am becoming discouraged from playing if I am going to keep getting set back nearly an hour or so every time I save and turn the game off. I realize it says it only saves your inventory and puts you "near" where you left off. But this autosave feature doesn't work very well. I hope the developers fix this autosave feature to either save more often or more accurately start you where you left off. That or I hope actual save points are reintroduced into the game.