This is going to sound like a non-issue, but when I breed I just have the most incredibly bad luck hitting my seed. I use my "main" version, White, for breeding, and I've calibrated it time and time again, finding that I hit C85 and C86 exactly the same number of times. But when I breed using one or the other, I will very frequently hit the wrong seed ten or more times in a row. This wouldn't be annoying if it happened for short lengths, or if it didn't happen very often, but this is uncanny. When RNGing a roamer or a field Pokemon I'd maybe hit the wrong seed four times in a row once or twice; in the case of Thundurus, I only hit the wrong seed four time in a row once in the 3-4 days I spent doing it.
The obvious answer is, "Well, switch it to the other." Then what happens? The game decides it likes the other one better. I just missed 13 seeds in a row, and switched, and missed the next 5 seeds. Is this normal for breeding? Are there files people get that hit seeds in, say, an 80/20 ratio instead of 50/50? Do I just need to buy a new cart and "hope for the best," or is this a problem that can be solved in the game's initial setup a la ID/SID generation?
I don't want to sound whiny--I know everybody has shitty luck once in a while--but I'm really, really losing patience with this game's stubbornness. I definitely don't want to give up RNGing but what the hell can I do now? What do y'all suggest? Anything is very much appreciated.