Autosaves should not be automatically deleted when you load a non-autosave save. Several times I have accidentally clicked on the wrong saved game (due to a weird bug that alternately duplicates and deletes saves for a given character, resulting sometimes in the loss of the most current version of the character but the presence of another save that looks like it) and lost hours of progress. Deleting the autosave on loading another save would be acceptable if the game and its save system were actually stable, but they aren't so it isn't.
Correct answer: fix the save dupe bug, leave autosave behaviour unchanged. (Assuming it's not steam cloud rearing its buggy head again, which is the only time I've heard of that kind behaviour before now.)
