Here are the bans of both clients neither of them have an ident ( spoofing in ETbot would show the same ident as well iirc ) 
The problem we having is we are also getting this with some of our other members who are on mac. 
Anyways i provided below the information of the bans, are these bans bugged/spoofed or are they legit bans? 
  
It says : 8068:26 Forcing disconnect of duplicate guid 8D07318F035E4A003FF8DC7E8FD8565D for client 3 
but neither one of the clients had that guid so i'm confused to why he got banned. 
  
It's only happening off this player called "offtheblade", who connects daily to reassure this ban stays even after 
we unban him so players can play without the problems. Only thing I could come up with is he was spoofing something 
but i can't find nothing other then ident.. Can provide all the information needed to figure this out. 
  
-VJ 
  
P.s(User info logs are from the first time it happened, last one is the most recent.) 
  
  
  
[ban] 
name     = offtheblade 
guid     = D9BA985144520C8F0B6DFEFB205439A1 
sguid    = 6A18C29D205A1AEF808041359CE7BED8 
ip       = 186.232.162.189 
reason   = Automatic ban based on technical evidence of cheats. 
made     = 04/04/17 19:19:46 
expires  = 576393586 
banner   = silEnT 
ident    = 000000000000 
  
[ban] 
name     = ^0madamac^dS^0on 
guid     = 8D07318F035E4A003FF8DC7E8FD8565D 
sguid    = D99155554DBE1D6EFA8AC75CB3154F3A 
ip       = 186.177.45.209 
reason   = Automatic ban based on technical evidence of cheats. (Automated copy of a ban for PB GUID 205439A1, silEnT ID 9CE7BED8) 
made     = 04/04/17 19:19:46 
expires  = 576393586 
banner   = silEnT 
ident    = 000000000000 
  
  
"Userinfo: \g_password\none\cl_guid\unknown\cl_wwwDownload\1\name\offtheblade\rate\25000\snaps\20\cl_anonymous\0\cl_punkbuster\0\protocol\84\qport\30516\challenge\-2069120683\ip\186.232.161.2:26464 
ClientUserinfoChangedGUID: 1  n\offtheblade\t\3\c\0\r\0\m\0000000\s\0000000\df\0\dn\\dr\0\w\0\lw\0\sw\0\mu\0\ref\0\uci\31\lc\0\tv\0\sc\0 
Userinfo: \g_password\none\cl_guid\unknown\cl_wwwDownload\1\name\offtheblade\rate\36000\snaps\20\cl_anonymous\0\cl_punkbuster\0\ip\186.232.161.2:26464 
clientDownload: 1 : beginning "etmain/cortex_who.pk3" 
Redirecting client 'offtheblade' to http://pk3.drishare.net//etmain/cortex_who.pk3 
Sending heartbeat to etmaster.idsoftware.com 
Sending heartbeat to master0.etmaster.net 
Userinfo: \cg_ident\0000000000007FD0\cg_etver\4\cg_c\0.9.0\cg_cmodbuild\win-x86 Aug 25 2015\cg_uinfo\13 0 100\sil_guid\6A18C29D205A1AEF808041359CE7BED8:2\g_password\none\cl_guid\unknown\cl_wwwDownload\1\name\offtheblade\rate\36000\snaps\20\cl_anonymous\0\cl_punkbuster\0\ip\186.232.161.2:26464 
ClientUserinfoChangedGUID: 1 6A18C29D205A1AEF808041359CE7BED8 n\offtheblade\t\3\c\0\r\10\m\0000000\s\4444444\df\0\dn\\dr\0\w\0\lw\0\sw\0\mu\0\ref\0\uci\31\lc\0\tv\0\sc\0 
ClientBegin: 1 
ban: offtheblade is now banned 
  
  
Userinfo: \g_password\none\cl_guid\8D07318F035E4A003FF8DC7E8FD8565D\cl_wwwDownload\1\name\^0madamac^dS^0on\rate\25000\snaps\20\cl_anonymous\0\cl_punkbuster\1\protocol\84\qport\40682\challenge\277864001\ip\186.177.45.209:27960 
ClientUserinfoChangedGUID: 6  n\^0madamac^dS^0on\t\3\c\0\r\0\m\0000000\s\0000000\df\0\dn\\dr\0\w\0\lw\0\sw\0\mu\0\ref\0\uci\50\lc\0\tv\0\sc\0 
Userinfo: \cg_ident\000000000000AA6D\cg_etver\4\cg_c\0.9.0\cg_cmodbuild\win-x86 Aug 25 2015\cg_uinfo\13 0 30\sil_guid\D99155554DBE1D6EFA8AC75CB3154F3A:2\g_password\none\cl_guid\8D07318F035E4A003FF8DC7E8FD8565D\cl_wwwDownload\1\name\^0madamac^dS^0on\rate\35000\snaps\20\cl_anonymous\0\cl_punkbuster\1\ip\186.177.45.209:27960 
Dropped client 6 when enforcing bans using client identifications. New ban created for user. 
adminchat: silEnT: Player ^7^0madamac^dS^0on^8 (6) dropped while enforcing ban to offtheblade^8. New ban created for user. 
ClientDisconnect: 6" 
  
  
  
  
8068:26 Forcing disconnect of duplicate guid 8D07318F035E4A003FF8DC7E8FD8565D for client 3 
8068:26 ClientDisconnect: 3 
8068:26 ClientConnect: 5 
8068:26 Userinfo: \g_password\none\cl_guid\8D07318F035E4A003FF8DC7E8FD8565D\cl_punkbuster\1\cl_anonymous\0\snaps\20\rate\25000\name\^0madamac^dS^0on\cl_wwwDownload\1\protocol\84\qport\51926\challenge\277864001\ip\186.177.45.209:27960 
8068:26 ClientUserinfoChangedGUID: 5  n\^0madamac^dS^0on\t\3\c\0\r\0\m\0000000\s\0000000\df\0\dn\\dr\0\w\0\lw\0\sw\0\mu\0\ref\0\uci\50\lc\0\tv\0\sc\0 
8068:26 chat(client): ^0[^1DRi^0]^1:^7 ^0madamac^dS^0on^7 connected from ^1[^7186.177.*.*^1] ^1[^7Costa Rica^1] ^7using client ^1[^72.60b^1] 
8068:36 Kill: 2 9 59: shinebox killed ^1D^0Ri*^1D^0aRk^1P^0iMp* by MOD_AKIMBO_LUGER 
8068:43 Userinfo: \cg_ident\0000000000002126\cg_etver\4\cg_c\0.9.0\cg_cmodbuild\win-x86 Aug 25 2015\cg_uinfo\13 0 30\sil_guid\D99155554DBE1D6EFA8AC75CB3154F3A:2\g_password\none\cl_guid\8D07318F035E4A003FF8DC7E8FD8565D\cl_punkbuster\1\cl_anonymous\0\snaps\20\rate\35000\name\^0madamac^dS^0on\cl_wwwDownload\1\ip\186.177.45.209:27960 
8068:43 Dropped client 5 when enforcing bans using client identifications. New ban created for user. 
8068:43 adminchat: silEnT: Player ^7^0madamac^dS^0on^8 (5) dropped while enforcing ban to offtheblade^8. New ban created for user. 
8068:43 ClientDisconnect: 5