OP
A: The "sort of" was that I was simply buddy diving with a new buddy (although it was at the request of my instructor), not specificaly DM diving with a class.
B: I did a buddy check with her at entry and looked at her gear when she had the minor freeflow mentioned. We then floated at the descent point while the rest of the group gathered together. When we all were ready to descend, she simply grabbed the wrong regulator (the 2 looked very similar). As she had never dove with it before, the pony reg was not attached to the BC like the octo was. We didn't realize what happened untill there was a problem. It was a simple honest mistake that I didn't catch at the time as I was distracted with starting my own descent.
B: I did a buddy check with her at entry and looked at her gear when she had the minor freeflow mentioned. We then floated at the descent point while the rest of the group gathered together. When we all were ready to descend, she simply grabbed the wrong regulator (the 2 looked very similar). As she had never dove with it before, the pony reg was not attached to the BC like the octo was. We didn't realize what happened untill there was a problem. It was a simple honest mistake that I didn't catch at the time as I was distracted with starting my own descent.