32.5% SD, 12.5% Dwarf would be the result of offspring x 50% SD, which would honestly not be worth classifying as SD or Dwarf at that point. Too much mainland circulating it.
25% SD 25% D 50% Mainland, will still be ever as large as a 50% Jampea which is still large. Until you integrate second generation 50% SD blood, the lines stay above 10' in my experienced opinion.