By Zeus, this thread along with the thread on VS47 makes me think a systematic review of Usener's "fragments" would turn up multiple problematic Epicurean attributions. It seems to me he and his colleagues may have been playing fast and loose. I have no doubts about Usener's scholarship and erudition (just as I respect DeWitt's qualities), but it seems to me he may have got a little full of himself that led to some hubris.
(PS: Some may say that I have hubris to even question Usener or Bailey or even DeWitt, and maybe that's true. I would defend myself by saying that I'm not questioning Usener, Bailey, etc al. on a whim. I find a troubling number of their citations lacking in relevance to their assertions. I find their "corrections" and "reconstrctions" to be more flights of fancy in some places than reasoned well-founded scholarship. All this might mean that we have less extant Epicurean texts than we're led to believe, but maybe we need to concentrate on what we clearly have than what we like to have. )