The buns you've switched to, at least in the Chicago area, are not very good. I've actually stopped going to wendys because of this.
This program is only allowing me to submit my complaint if it is over 100 words, so I will add this -
Why is it that if I order a double with ketchup only, I get a double with ketchup AND cheese? The guy behind the counter says they all come with cheese. Well, they all come with onion and tomato too, but I don't have to specifically say not to put them on. Ketchup only means ketchup only!