Almond yogurt- didn't turn out at all

Well, I attempted to make some almond yogurt yesterday!  Seemed like it might turn out ok, but since I'm not a very experienced yogurt maker, maybe it wouldn't have either way.  Andy was supposed to move the yogurt from the yogurt maker to the fridge when he went to bed, but forgot.  I looked at it this morning and it was pretty gross.  The 'yogurt' had set at the top with most of the jar filled with liquid underneath.  YUCK!!!  And it smelled just as bad.  And FYI, the pregnant lady should not deal with emptying the contents- I started and after the first one gagged and had to leave the room.  Luckily Andy was nice enough to finish the job!  So I might try again, but maybe I need to adjust the fermentation time!  What a delicate process this can be!