Pictures are a big help to id your problems...but i'm sorry it sounds like you have two almost dead plants from my guess. It's important to check the roots of potential new additions to your collection. Almost every sellar drops the plastic pot into a clay pot for looks. Lift the plastic pot out and look for plump healthy roots with no brown ones visible. Also, when I get them home I segregate the new one from the others until it's checked for bugs and sprayed. A dendrobium I bought six months ago still has me chasing bugs off my phals because I didn't do this.