trouble with AddToGroup

Alright, I have been having some trouble with this, maybe some of you 
can help. I have similar schematic components throughout my theme (ie 
color setup) so in order to cut down on redundant config lines, i 
decided to add them to color groups, however, I am having some severe 
issues with xtaskbar.

First the color group:
    stdDarkPaintingMode     .multicolor
    stdDarkColors            404040 707070 000000
    stdDarkGradientColors    202020
    stdDarkGradientType        .vertical
    stdDarkFontColor         EEEEEE
Then the taskbar:
    *xtaskbar taskbar_
things I have tried:
    taskbar_NormalButtonAddToGroup stdDark 
    ;; The above doesn't work because then the group would need:
    stdDarkNormalButtonColors .. etc
since i only have 1 taskbar, thats rather out of the picture, as it 
doesnt cut down on lines
As per Andymons suggestion, I have tried :
    taskbar_NormalButtonTextureAddToGroup stdDark
    taskbar_NormalButtonBevels 1 1 1 0
However, this ignores the bevels for the taskbar
Also, setting multiple groups such as:
    taskbar_NormalButtonTextureAddToGroup stdDark task_Normal
doesnt work either, because the 2nd group seems to get ignored

I finally had to resort to 'nested' groups, such as
    taskbar_NormalButtonTextureAddToGroup task_Normal
    task_NormalBevels 1 1 1 0
    task_NormalAddToGroup stdDark

Has anyone else had trouble like this?  I'm just tryin to figure out how 
things work ...

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