2D Graphs Blending together

When ever i make pie graphs in excel 07 the graphs come out correct, but when
i change styles, some of the slice override the others. The main style i
change it to is style 47(black background 3D Look). i have tried remaking the
graphs and it still happens. Also i have tried to select the individual
slices to check and make sure their colors match the legend which they do.
Any Ideas on how to fix this would be greatly appreciated. Also i can use
the regular pie charts just fine but need the extra flair for presentation.