I stopped keeping notes ages ago. Not worth it once you get past a certain point.
Your computer only keeps track if you TELL it to keep track. In other words, you must actually enter a log of the brew in order for the "computer to keep track for you"
There have been countless times I just printed off a recipe and brewed away. Never entered anything into the puter regarding OG, brew dates, or anything else. In over 15 years of brewing I couldn't possibly telly how many batches I have brewed. And I don't care. It is not a contest, dudes, either about your brewing proficiency or your anal-retentive record-keeping. Brewing is just fun.