I believe (have not really dug into this) that if you look at the list and see the ones that are in BOLD - I think these are the ones that are registered
[pulling up soapbox]
I kind of have a issue with the whole registered non registered also. To me, just plain little ole me - since this sale is being put on by "The Plumeria Society of America, Inc." then all registered plumerias at the sale should have a tag that states name and number and everything else - Tagged NOID
[getting down off soapbox]