What you should be doing with your ace side count is a) determining how rich or poor the two decks are in aces and then b) temporarily adjusting your running count to compensate.
So, for example, if there is .5 decks dealt (1.5 remaining) and you have seen 3 aces then you can determine you are now one ace poor. Naturally you expect to see 1 ace per quarter deck. So given that you are one ace poor you would temporarily add +2 to your running count. So if the running count is 2, then you would adjust it to be 4, then do your insurance check (4/1.5 = 2.33) which is higher than your insurance index of 2.2 so you take insurance. Then you "reset" your running count back to 2.
Another example :
3/4 of a deck in and the running count is +5. You have seen 1 ace. Here you figure the deck is ace rich by two aces, as you should have seen 3 by now. So you subtract 4 (2 for each extra ace still in there) from your +5 running count to get +1. Then you divide by 1.25 to get .8, and since this is below 2.2 you do not take insurance.
In terms of betting you would rather the deck be ace rich than ace poor.