The description is covering all bases I think. The flowering depends on which parent it follows. The delenatii will cause it to have more than one flower, probably 2 at most. They can flower as one open plus bud and maybe the 2 out together or the first open flower drop and the bud open. It may have only one flower if the Conco-bell' is followed with the odd chance of 2 flowers. It also depends on your culture. If you are an extremely good grower of these types of Paphs, the chance of 3 flowers per spike would increase but highly improbable.