Loosie, I don't want to sound ignorant, but can you explain the lines you drew? I get a couple, like showing how the toe and heel on the hind foot aren't parallel (right?), but I don't know enough about the lines to understand what you're pointing out with the rest.
Also, looking at the pictures again, the LF heel seems to more resemble a crushed heel than the RF. The RF heel is far more upright and doesn't curve like the LF heel. At least, that's how it appeared to me.
The wind of heaven is that which blows between a horse's ears. ~Arabian Proverb