Angraecum eburneum v. comorense?

[naoki]

I got a plant labeled as Angraecum eburneum v. comorense, but it doesn't seem to be a correct name. I think it used to be Angraecum comorense, but it is now synonymous to Angraecum eburneum ssp. superbum. Am I correct? I don't know much about this genus, and bought a couple Angraecum without doing much background check. I'm a little puzzled because I bought both A. eburneum v. comorense and A. eburneum superbum from Oak Hill Gardens at the same time (early this summer). I'm wondering why they use two different names for the same species. Any idea?