I had this problem with a director/producer in production meetings, once. I've always been good with short, effiecent and productive production meetings, utill I started working with this particular director. She worked in exactly the same way as you describe above. In addition, she wanted instant fixes for things that needed time to be mulled over.
Finally I hit on a solution, that seemed to work without stepping on everyone's toes. I'd let her repeat herself twice. When she started the third time, I'd interrupt her, politely, and pretend I didn't understand what she wanted, while at the same time paraphrasing her words clearly and succintly. Sort of, "Just a second, Sue*, I'm not sure I get what you're saying, let me try to work it out. You're unhappy with the scenic design because of X; you want it to be a bit more like Y. And you don't feel that the props design fits our budget, so you want them to re-vamp it on a smaller scale. Did I get it right?"
She usually replied, "Yes, that's exactly my problem."
Before she could launch into all the reasons, AGAIN, I'd quikcly turn to the designers in question and ask if they understood what was needed. Again, the answer was usually yes. I'd immediately ask if there was a solution they could suggest this very moment, or if they needed a few days to get back to the drawing boards. Usually they needed a few days. They knew that before, but they were under such direct pressure from the Director and her berating, that they got caught trying to defend their design, or think of something off the top of their heads.
Sue* was usually content with a coherent answer to her concerns, even if it was just, "I need a few days." We'd set a time-line to come back to the issue in question, and bob's-yer-Uncle, we were on to the next topic.
I know your problem is partially in a rehearsal situation, but I think the structure I outlined might help, anyway! People (myself included) usually repeat themselves over and over because they feel they're not being understood.
*names changed to protect my career!