Your dating app sucks. First no real control over the profiles you see. You should be able to eliminate people on the basis of smoking and other topics. Second you should be able to see whether or not someone has looked at in the invitation to connect that you sent them instead of just wondering did it ever get delivered. Third people that you have passed on and even blocked keep reappearing in your choices. If you have already passed them by once before because you're not interested.....