So today they asked me to hold one of the 4 days I had available. Then they came back and asked about 1 of the 2 I wasn't. I said I still wasn't, and then it turned out that was the only day of the 6 they could use me. And there ya go.
And I was at another audition this morning and the casting guy let me know that that other client definitely wanted me to come in for the second callback tomorrow. He said they "love" me. And I'm thinking, "If they love me, then go ahead and book me."
If I don't get this one I'll be ticked.