Our 1st doe, M-7, was VERY agressive!! She was so bad, even the agressive bucks were no match. She would show him what for, humping him and spraying. Since she was such a great mother, we put her attitude aside and hled her for her couplings with the bucks. It worked out better, and took much less time.
I'm still holding fast that it's a dominance thing, and may well be a breeding thing, but I was saying in MY experience, and what I have read (haven't read everything so maybe it's in something I haven't gotten to) does do not cycle on a regular or predictable schedule, and I have never seen one act aggressive because she was ready. Any of mine that were ready, immediately lay flat with the tail in the air.
I wasn't discrediting what you were saying, just I've observed differently.