It's because these older Phrag hybrids have been toss a round so much that tags are lost, broken and /or switched. One grower pass on divisons and the like don't really know what the hybrids looks like and assumes the name is correct. One plant with many divs of it could have 2, 3 or more names for the same thing. It's a mess to straighten out. I have one plant that I got the name straight because I posted it here! Thank you all!
There is a long tale, that I lack the time to tell. The upshot is, floating around the hobby there are many divisions of an old Phrag that we could call 'X', it was imported into the United States from an old English Phrag collection by a firm well known in the 1960's in California. Various divisions of clone 'X' have been submitted for awards under a dozen names and if it is well grown it always scores between 79 and 84 points. (judges recognize quality about the same) Some of the names on divisions of clone 'X' include schlimii 'Wilcox', schlimii 'Birchwood', Cardinale 'Birchwood', Cardinale 'Liisa', Sedenii 'Grace', and quite likely several others. I have divisions of both Cadinale 'Liisa' and Cardinale 'Birchwood' and the longer I grow them, the more convinced I am that they are divisions of the same clone. There are long wordy provenance stories to go with these names and why I make these assertions, but the end result is, this clone 'X', when grown well and shown will get awards, usually between 79 and 84 points.
Dot, I would keep your plant labelled just the way it is, and recognize that it has a long history that involves knock down, drag out fights about its identity between old famous names including R. Wilcox Jones, Stewart's Orchids, Jones and Scully, Rex van Delden, Merrit Huntington, G. R. 'Dick' Clemments, W.W. Wilson and even I got "spanked" (well deserved I might add) as a young one on the lecture circuit by Merrit for voicing an opinion on the matter without good documentation. Someday I will try to put something together, but those who cared the most have long since passed away. One of the old stories that is mostly forgotten now.
You have done a nice job growing the plant. Beautiful
Leo