You seem to have a decent grasp of picking sets and being aware of the wind, which is the #1 priority. Also, moving in closer on located coyotes is a good tactic.
I don't know that you necessarily did anything "wrong". Sometimes coyotes just aren't there, or aren't in the mood.
It's hard to say for sure without hearing the barking myself, but likely it was 'warning barks' because they had you pegged one way or another.
Couple things I'll add, based on yours and other's comments:
- I almost always start with howls, especially in the early morning, or toward evening. If it doesn't trigger a territorial response, it may at least get their attention.
- People have had success with silence between sounds and with just running the call continuously. It can work either way.
- I don't think coyotes are capable of rational thought, like "hey it sounded like a coyote over there earlier, now it sounds like a rabbit getting mauled. Maybe that coyote is stealing "my" rabbits". Instead, I think they're just triggered by instincts (territory, hunger, breeding, etc).
- I start my caller on the softer side in case something is close, but don't be afraid to crank it up if nothing comes within the first couple minutes.
- "Matching the prey" of the area can work, but isn't really necessary. For example, you can call coyotes using a jackrabbit distress in an area with no jacks. Also, woodpecker seems to work for guys, but how many injured woodpeckers do you think a given coyote has ever heard? -- Goes back to the 'triggered by instinct vs rational thought' idea.
