Setting colors for each sim impossible

I recently bought a FP4 and I’m stuck with the above problem. I can pickup the color, but when I save my choice, it won’t be stored (the name is correctly stored, though). Both sim cards are set on orange and they both are shown in white (before I tried to change the colors, I had sim1 in cyan and sim to in blue, although the were shown in blue and green respectively. I wasn’t satisfied with the colors, but now it’s worse. Any idea how I could fix that? I found a topic rather close to my problem (it was switching the numbers for the sim cards, a feature I would also have liked!) and the answer was to select appropriate colors and names, which seemed to work then, as the problem seemed to be solved.