QSplitter with layout will use stylesheets incorrectly

I've performed a simple test where I apply one long Style Sheet to the
main form for all the widgets in the application, where I distinguish
them by a custom property that I have added.

My Style Sheets looks as follows:

QLabel

{ color:blue; }

QLabel[ParamStyle="Param"]

{ font-size: 50pt; font-weight: bold; color:black; }

QLabel[ParamStyle="Title"]

{ color: gray; font-size:14pt; }

QLabel[ParamStyle="Unit"]

{ color: gray; font-size:10pt; }

My special labels has this property sets.

This works great all over the form with layouts and frames.

It breaks when I tried to apply though a splitter.

When the splitter has any kind of layout applied to it, the
more general directive takes over and I see all my labels in blue
regardless of there property ParamStyle.
It looks correct on the Designer preview, and looks wrong when the application runs. When I remove the layout it looks fine on both. Also if I remove the general directive
(the first one on the top that applay to all QLabel) and still use the layout I get a good result for the ParamStyle labels, but of course I looses the blue color.