There seems to be two schools of thought on how to rig up dropper flies. The older concept, I think, is that of having a floating fly tied to an extended piece of tippet coming off the side ofthe main leader that carries the sunken fly. A more popular method now is to have an added length of tippet simply tied to the bend of dry fly hook, and tying the sunken fly to it.
With this second rig the dry fly would obviously have two pieces of tippet coming from it that would impair hook ups.
Would anyone care to comment?