Dog training and Poodles with attitude...

Well, dog training on Saturday morning proved to be interesting...and offered more setbacks than solutions.
Rosa proved to happily play with puppies that were around her size - and not fluffy, however, did appear to be growly towards fluffy things that yapped at her. One in particular, was a toy poodle called Mia.
Mia just yapped incessantly and got in Rosa's face.
Time came when we all had to pat each other's dogs and introduce them to each other. Mia yapped in Rosa's face and Rosa snarled and lunged.
Then some wise decision was made by the instructors that now as a good time to go to the offleash area. I kept saying, Rosa is going to eat Mia. Seemed to fall on deaf ears. What would I know? They are the 'experts' after all.
Anyhow, all dogs were off leash and happily introducing themselves. Rosa made the mistake of introducing herself to an onleash dog who was being re-socialised. All was fine, then she must have pushed the boundaries of his comfort and he lunged/barked/growled towards her. Being a staffy, she won't back down from a fight - she didn't do anything, just lots of awful noise and snarly looks. We pulled her away, and then Mia got in her face. She pinned Mia down by the throat. Hmmmm. No damage. Only to Rosa - who was bleeding from the chin.
The trainer said, Oh, she's just got her in the classic trying to get her submissive pose. By this stage I was feeling very uncomfortable. Then they said, okay everyone off leash again - Mia the poodle was still in her Mum's arms. Rosa hopped up and grabbed Mia down and had her pinned again. Obviously hadn't felt that she had finished making that thing submissive. A toy poodle is no match for a staffy though.
The trainers then had the gall to say, oh , this has never happened before.
Now I have to try and determine what it is about fluffy yappy things that causes her to go nasty, and try and work through that....
I spoke to my dog trainer last night and told her, and she said that she couldn't believe the stupidity of letting first time mature dogs off leash....
doesn't help my issue now though... especially with our puppy coming in two weeks.