No, you don't decrease because of a bounce.....The only time you decrease the dose is if they drop below 50 on a human meter on Tight Regulation
Bouncing is a normal part of the sugardance....It can happen when 1. the BG drops too low 2. the BG drops too much, too quickly 3. The BG just drops into a number their body isn't used to anymore. (or any combination of the 3)
The liver releases stored sugars and hormones to bring them back up to where it has gotten used to living at.
It can take up to 6 cycles for a bounce to clear, so about all you can do is hang on for the ride