I am so happy that Rodinal states 1+25; 1+50 or 1+100 and my Ilford chemicals 1+4 or 1+9 much much easier to understand. After all as we soup our negs we are cooks not scientists LOL

But as already said as long as the dilutions are consistant for your own use, does it really matter. Remember if you always make the same dilution then it becomes a standard for your use and that's all that matters.