Go to Windows --> My Documents --> Mount&Blade Warband --> open rgl_config with any shit like notepad --> go to line named as max_number_of_connections , reduce the default number, for example to 6, 8 or 10,save changes. Servers will be loading slower, but Master server will not skip any of them.
Sometimes it might be problem of your Network Card or router, try to update or reinstall the drivers, if you want to go deeper, you can also try to set it up for gaming (google and brain always helps in that case).
If its your provider fault, you can do nothing with it.
Also Warband Master Server is kinda shity and u can do nothing with this turks too