There is just one thing that I am certain of in all the above, and that is that Cheri's bowl is the Sowerby 2565 (which is also known in Carnival Glass as "Flora"). The bowl can be found with straight up sides, slightly cupped in or flared out (I think they called that flanged).
I am not totally sure that Paul's blue bowl is the same as Anne's green bowl. Paul's blue bowl appears to have 12 panels - and the apex of the flute (pointed edge of the "scallop") appears to be located at the moulded lines that form the panel sections.
Anne's green bowl has 16 panels, as had the blackpoppy bowl. The apex of the flutes around the edge appears to be more sharply shaped than Paul's bowl - and also the apex of the flutes appear to be located at the mid point of each panel.
I can't be sure from the photos, Anne, but there is an angular tear drop shape on each of the panels, by the centre of the item on your Davidson plate. Also there are more panels on the Davidson plate, but this could just be because of a size difference.
I have a feeling that Paul's bowl is not exactly the same as any other we have seen so far.
What I feel this does show, very clearly, is that manufacturers, agents, wholesalers and customers all mixed and matched their bowls and ladies!