That does happen ! I know a couple of people that were following me are no longer present. I guess the number doesn't change. As soon as they fix the followers problem, you'll be able to see all who follow you and who you follow. Hopefully, that will clear up the number problem also. You're a newer member and usually you can see most of them but for most of us, we can see only one page of people. I think the two are related to the same problem. It's in the works as the next fix !