Tony, this must be a misconception. Look at KEW 'The Plant List' it lists Paph. leucochilum as synonym of Paph godefroyae. Also the 'RHS Orchid Register' lists the pollen parent of Paph Mint Chocolate as Paph. godefroyae.Pulling it up on Kew says it's accepted. I noticed it recently when "old" hybrids with new grex names started opping up in the awards record.