If you don't have add buttons, there is still a match you haven't dealt with. Make sure you haven't hidden completed rows, and make sure you've accepted or rejected every possible match for every person. Some people will have more than one possible match, and you have to deal individually with each one. If you have more than 500 people, make sure you've looked at every page of the report. And make sure you've marked the possible match offered for your own profile. (That's where I got stuck for a bit.)