I don't have any WS467's, so I can't test what happens if you turned the light off from 50%, and then try to turn it on at the switch. (I was doing my testing with the lamp module) I have a feeling it will come on at 50% (resume dim). The fix it to hold the button for 5 seconds to force the light to ramp all the way up, or all the way down (if it goes down, hold it for 5 seconds again to ramp it all the way back up). However, I think that turning the switch off manually (at the switch) from a dimmed state results in it coming back on at that dimmed state when turned back on at the switch. I can see why it would have been nice if the user could turn this feature on and off.
The bug appears to be in AHP (and the SDK, if you are using it). The software is remembering the previous dim state of the module, and sending it a command to turn back on at that state (instead of at 100% - which is what an "on" should do).
All of your timers and macros should use "absolute" brightness levels, so the lights come on at exactly the level you want. As for controlling the lights manually from the interface itself, drag the slider up to 100% to turn the light on at 100%. Using the "toggle" will bring the light on at the last known dim level.
I don't know how much of this is a function of the "Resume dim" built into the switch, and how much of it is the software. However, I know that there is a software issue involved (since I saw the SDK send an Extended Code to the specific brightness level, instead of sending one to full brightness.
Strangely enough, if you tell the SDK to send an "ON," it still sends an Extended Code to the SoftStart modules, and it does so at the last know brightness level (other than "off"). This is another bug in the list.