Apparently I'm playing 11 v. Ace wrong

The game I play most is; H17, DOA2, DAS, RSA.

I was looking for a BS chart for my wife to use at the tables when I found the chart at the link shown below. I have been just hitting 11 against Ace at below +1 TC and lower, but doubling at +1 and above. The chart is showing to double at what would be a 0 count, given it's a BS chart. What is the correct play exactly? Is the chart incorrect? I saw another chart that said to hit 4/4 rather than split. What's up with all the BS charts available on the web?