There's a contact who I have saved in my phone book but for some reason recently when they message me it shows their number instead of the name? I deleted them and readded it to my phone book but same thing keeps happening.. anyone think of a reason why?

Also I'll get a notification that there are like 15 updates available for my downloads but when I go to it , it'll show only like 1 or 2

If anyone could help id appreciate it
~via smartphone