R1 / D3 weiter trennen?

Hi, my German is not that great in writing so here it is in English. Feel free to answer in German.
I've driven the route (Berlin - Boulogne-sur-Mer) and came across that very issue that the R1 and D3 don't see eye-to-eye. That is besides the fact that signs don't always follow the route I had on my GPS (based on OSM).
I would very much like to repair where I can, but I'm not sure about the course I should take on the issue of naming the route. My inclination is that in case of the R1, the D3 and R1 tags should be put separate. That way people driving along the route can choose to follow the R1 or D3. The route would show up like "D3/R1/[other routes]".
Note:
I use a mapstyle based on the work of "ligfietser". Link to his work: http://sites.google.com/site/openfietsmap/
It showes the bicycle routes very well ;-)