Server/client issue

Hey! whats going on guys, im having this little problem with my server, i come home from school check srcds console, about 23 people through the day have “player has joined” and never appear or disconnect or they get dropped, why is this?, when i sit in the server for awhile i get about 5 joins every 10 mins, but about 2 out of 5 appear, bad server.cfg, router?, theres NO firewall on the servernothing running, just srcds

Australian Build server, wire, map cycle, tool packs ect in need of players and admins

(Build then Play Australian server) please enjoy my poor grammar