Vanda Rothschildiana (Vanda coerulea x Vanda sanderiana) is a primary hybrid, not a species and you are right about the name not sounding like a species. You should change other tags to a capital "R".
If you want a temporary name until you talk with Rafael, I would use C. gaskelliana f. coerulea.
The reason understanding this name terminology is important is that these growers/venders don't. When you buy an orchid, you're pretty well on your own to figure out what it is. The best you can hope for is that the tag will give you a clue as to where to start looking.
Jim
