If your WGDC is at 100% than it has closed the Wastegate in the turbo to allow maximum boost. In other words, 100% WGDC = Closed WG = MORE boost. 0% WGDC = Open WG = No Boost. Your WGDC should hit 100% upon mashing the pedal (most DH's will not see this as it is quick) and then tapper off to maintain your boost targets. The higher the WGDC the harder it's trying to meet your targets and the lower the number it does not have to work hard to maintain.
So in your case (or anyones) where the WGDC is 100% then you have a leak somewhere as the WG is staying closed because you are not meeting your boost target.
In the OP's case, the WGDC is perfect and he has no issue as far as I can see. Yes he is losing boost but it is past where the WG can control it (which is weird as I believe the WGDC is based off Mani Pressure). His WGDC is like 38% which implies he is bleeding boost to meet his target PSI which is fine as it implies he is making more boost than needed and has to bleed boost to maintain his target PSI. Maybe a bad map on the AP? Have you tried another MAP? Usually there is a higher WGDC Map associated with the map you're running. If not, then try another MAP and see if it improves. I honestly don't see any issue with your logs. Your boost targets in the map you are running might simply be too low. I would seriously try another MAP and see if that helps. Also I thought the AP had issues with the CPE SRI?
Here is a copy of my most recent log. You can see that the WGDC goes high then tappers off and maintains. This is along the lines of what you should see.
http://spreadsheets.google.com/pub?key=t6-dtnBwAL7gFdCfGvGZorQ&output=html