Have you seen this pattern before?

[BlackOak2]

Whoops!
I did!
Sorry. I think it was one of those type what you're not thinking things. I do have a tendency to do that, but generally, I catch it before I post it.
She is brown. Not bay.

Ahaha! It all makes so much more sense now. That's so funny. And I suppose I feel a little bit better about my own understanding of genetics, at least on this one point. I really thought I must have been missing something huge there.

You're not missing anything.
When I first looked at her, I immediately agreed with you that she was grullo, but upon staring, I realized she wasn't.

... I really can't believe I didn't catch my own mistake...