Ummm. yeah.
maybe if you try slightly different things and it seems to work you could just mention it to her - like the wrapping. I mean that's not judgmental, it's just advice. But I guess you can't really put yourself in a position where you might be seen to be questioning her decisions. I spose many jobs have these sorts of pitfalls and you just have to trust that she's doing the best by her children.
I think it's important to remember though, that as long as this child is not coming to harm, it is not our job (I;m a director of ccc) to pass judgement and implement our ideals on parents - we may not agree, but it is our job to follow parents wishes with their children.
Personally I would be pretty annoyed if I didn't want my child nursed to sleep and carers got them into that routine in the centre and then I had to do the same at home - just as an example.