Nothing has really been reclassified per se...

Whether the two could interbreed wasn't discussed. It has been shown however that Dolly Varden will interbreed with Brook Trout producing sterile offspring.

Its kind of another example of what I call a 'regional misnomer'...like when people out here refer to the spotted skunk as 'civet cat'. Civet cats are a rare and nearly extinct relative of the mongoose that are indigenous to the jungles Indonesia...but try telling that to a local resident out this way and the most likely reaction you'll get is 'Huh?'

I have unofficially renamed them 'Bully's' in my fishing parlance, providing everyone with another opportunity to not know what the hell I am talking about, hehe.