[mkgmap-dev] Order of rendering areas?

Hi folks, This is a cosmetic issue, really, so not urgent. I have a large area marked amenity=university and within that, some buildings, fields, a lake, etc. However, only the university area shows up as it seems to be rendered last; the buildings etc flicker briefly into view while scrolling around, but are hidden when the rendering stops. Does anyone know if it's possible to specify the order things are rendered in? I tried moving the amenity=university way to be the first way in the xml file, but it made no difference. Or is this just the way the etrex behaves? Cheers, Andrew