Hi, OP again.
For those who have asked about making R more aware of her behavior, I have. And not just me, the VP and the principal have spoken with her about it as well. I have been telling her people are trying to get in touch with her, she needs to answer them, and she either just laughs or blows it off. (Lack of communication has happened before with our fundraising outside rep, the school custodian, the owner of a local business, other parents, and me).
I'm scaling back my involvement with them because of how disorganized it all is - no one is really assigned any projects, whoever feels like it takes them on, and nothing is communicated to the other officers about who's doing what and what's getting done. I'm expected to do flyers and write articles for the school newsletter on what we're doing, and I get either no info or info on the date the article/flyer is due. I won't even go into what happened to me with the fundraiser items because then I will need to take a blood pressure pill and have a lie down.
Anyway, long winded post short - I e-mailed the teacher back and told her that I'm not involved with this project and my best suggestion for her was to call R again and to send her an e-mail. I got a reply from her this morning that said "Will do! Thanks." so I guess that's that.