No Michelle, you aren't doing anything wrong! Bounces are not something you can control. They are instinctive and about the only way I know of that you can avoid them is to not let the numbers go low enough to cause them to happen. The problem with that is that then the condition doesn't improve.
For instance, if he's at 350, and you have a dose that only drops him to 225, he probably won't bounce. But he won't improve either because all the numbers are still too high, still too "diabetic".
His body thinks diabetic numbers are "normal" right now. When he drops into lower numbers, his body thinks "what the heck is this? This isn't normal, it's too low!" and a self-defense mechanism kicks in and causes his liver to release "sugar" into his bloodstream to stop the numbers from being so low. They aren't too low, but "he" thinks they are.
The only way that eventually all the numbers "come down" is for his body to become used to them. And that means "bounces happen". But the more often his numbers go lower, the more his body will allow it to happen.
The trick is to get them low enough so that they allow his body to heal, but not so low that he bounces every time he sees a low blue or high green number. Ideally, as he heals, his preshots will come down overall. Then you reduce the dose a bit to make sure he doesn't go "too low" in the middle. You sort of have to find a happy medium where he runs overall lower, but not too low. Then he won't go really high at preshot time from bouncing.
Adjusting the dose based on the "highs" can help you find that happy medium.
You don't want a curve that is shaped like this :-|
And you don't want a curve that is shaped like this
You want a curve that is shaped like this :smile:
Then you do a lot of this :mrgreen:
;-)