also can you please describe more about "bot's models dont show up", because there are no special models only for bots
sorry for delay.
bot nicks saying what where were some changes made.
can you please paste you server.cfg and config.cfg somewhere(pastebin.com is ok fo example). and bots.txt also if you changed it. it seems you made some deeper changes in server.cfg or maybe in config.cfg than necessary.
can you also supply us a screenshot output of sv_cmd cvar_changes ?
PS. you also can simply delete/rename server.cfg and config.cfg files to return you game state to initial and try again.