Same, I get around 30 bottles because I only rack twice: once from my fermenter to a carboy and once back to a bucket to bottle. I only worry about getting the wine off the gross lees. I top up with similar wine. I typically let it ferment to dry in my bucket so that I can stabilize and then top up all the way in the carboy.I guess I must rack dirtier than most and top up with wine, either mine or something else. I always get a full 30-31 bottles from wine kits.