Post the content of your syslog while starting, and also while stopping the tunnel. Also make sure you don't have the option to block traffic in one of the four other OpenVPN clients.
Jun 17 19:55:18 rc_service: httpds 1614:notify_rc stop_vpnclient1
Jun 17 19:55:19 openvpn[1884]: event_wait : Interrupted system call (code=4)
Jun 17 19:55:19 openvpn[1884]: SIGTERM received, sending exit notification to peer
Jun 17 19:55:21 dnsmasq[1874]: exiting on receipt of SIGTERM
Jun 17 19:55:21 dnsmasq[2841]: started, version 2.76 cachesize 1500
Jun 17 19:55:21 dnsmasq[2841]: asynchronous logging enabled, queue limit is 5 messages
Jun 17 19:55:21 dnsmasq-dhcp[2841]: DHCP, IP range 192.168.1.2 -- 192.168.1.254, lease time 1d
Jun 17 19:55:21 dnsmasq[2841]: using local addresses only for domain THEGIBSON
Jun 17 19:55:21 dnsmasq[2841]: read /etc/hosts - 5 addresses
Jun 17 19:55:21 dnsmasq[2841]: using nameserver 64.71.255.198#53 for domain phub.net.cable.rogers.com
Jun 17 19:55:21 dnsmasq[2841]: using nameserver 64.71.255.204#53 for domain phub.net.cable.rogers.com
Jun 17 19:55:21 dnsmasq[2841]: using local addresses only for domain THEGIBSON
Jun 17 19:55:21 dnsmasq[2841]: using nameserver 64.71.255.204#53
Jun 17 19:55:21 dnsmasq[2841]: using nameserver 64.71.255.198#53
Jun 17 19:55:57 rc_service: httpds 1614:notify_rc start_vpnclient1
Jun 17 19:55:58 kernel: tun: Universal TUN/TAP device driver, 1.6
Jun 17 19:55:58 kernel: tun: (C) 1999-2004 Max Krasnyansky <maxk@qualcomm.com>
Jun 17 19:55:59 openvpn[2851]: OpenVPN 2.3.11 arm-unknown-linux-gnu [SSL (OpenSSL)] [LZO] [EPOLL] [MH] [IPv6] built on Jun 11 2016
Jun 17 19:55:59 openvpn[2851]: library versions: OpenSSL 1.0.2h 3 May 2016, LZO 2.08
Jun 17 19:55:59 openvpn[2852]: NOTE: the current --script-security setting may allow this configuration to call user-defined scripts
Jun 17 19:55:59 openvpn[2852]: Control Channel Authentication: using 'static.key' as a OpenVPN static key file
Jun 17 19:55:59 openvpn[2852]: Outgoing Control Channel Authentication: Using 160 bit message hash 'SHA1' for HMAC authentication
Jun 17 19:55:59 openvpn[2852]: Incoming Control Channel Authentication: Using 160 bit message hash 'SHA1' for HMAC authentication
Jun 17 19:55:59 openvpn[2852]: Socket Buffers: R=[122880->122880] S=[122880->122880]
Jun 17 19:55:59 openvpn[2852]: UDPv4 link local: [undef]
Jun 17 19:55:59 openvpn[2852]: UDPv4 link remote: [AF_INET]184.75.221.42:443
Jun 17 19:55:59 openvpn[2852]: TLS: Initial packet from [AF_INET]184.75.221.42:443, sid=3b90952f 4b6ba89c
Jun 17 19:56:00 openvpn[2852]: VERIFY OK: depth=1, C=IT, ST=IT, L=Perugia, O=airvpn.org, CN=airvpn.org CA, emailAddress=info@airvpn.org
Jun 17 19:56:00 openvpn[2852]: Validating certificate key usage
Jun 17 19:56:00 openvpn[2852]: ++ Certificate has key usage 00a0, expects 00a0
Jun 17 19:56:00 openvpn[2852]: VERIFY KU OK
Jun 17 19:56:00 openvpn[2852]: Validating certificate extended key usage
Jun 17 19:56:00 openvpn[2852]: ++ Certificate has EKU (str) TLS Web Server Authentication, expects TLS Web Server Authentication
Jun 17 19:56:00 openvpn[2852]: VERIFY EKU OK
Jun 17 19:56:00 openvpn[2852]: VERIFY OK: depth=0, C=IT, ST=IT, L=Perugia, O=airvpn.org, CN=server, emailAddress=info@airvpn.org
Jun 17 19:56:03 openvpn[2852]: Data Channel Encrypt: Cipher 'AES-256-CBC' initialized with 256 bit key
Jun 17 19:56:03 openvpn[2852]: Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Jun 17 19:56:03 openvpn[2852]: Data Channel Decrypt: Cipher 'AES-256-CBC' initialized with 256 bit key
Jun 17 19:56:03 openvpn[2852]: Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Jun 17 19:56:03 openvpn[2852]: Control Channel: TLSv1.2, cipher TLSv1/SSLv3 DHE-RSA-AES256-GCM-SHA384, 4096 bit RSA
Jun 17 19:56:03 openvpn[2852]: [server] Peer Connection Initiated with [AF_INET]184.75.221.42:443
Jun 17 19:56:05 openvpn[2852]: SENT CONTROL [server]: 'PUSH_REQUEST' (status=1)
Jun 17 19:56:05 openvpn[2852]: PUSH: Received control message: 'PUSH_REPLY,redirect-gateway def1 bypass-dhcp,dhcp-option DNS 10.4.0.1,comp-lzo no,route-gateway 10.4.0.1,topology subnet,ping 10,ping-restart 60,ifconfig 10.4.18.223 255.255.0.0'
Jun 17 19:56:05 openvpn[2852]: OPTIONS IMPORT: timers and/or timeouts modified
Jun 17 19:56:05 openvpn[2852]: OPTIONS IMPORT: LZO parms modified
Jun 17 19:56:05 openvpn[2852]: OPTIONS IMPORT: --ifconfig/up options modified
Jun 17 19:56:05 openvpn[2852]: OPTIONS IMPORT: route options modified
Jun 17 19:56:05 openvpn[2852]: OPTIONS IMPORT: route-related options modified
Jun 17 19:56:05 openvpn[2852]: OPTIONS IMPORT: --ip-win32 and/or --dhcp-option options modified
Jun 17 19:56:05 openvpn[2852]: TUN/TAP device tun11 opened
Jun 17 19:56:05 openvpn[2852]: TUN/TAP TX queue length set to 100
Jun 17 19:56:05 openvpn[2852]: do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0
Jun 17 19:56:05 openvpn[2852]: /usr/sbin/ip link set dev tun11 up mtu 1500
Jun 17 19:56:05 openvpn[2852]: /usr/sbin/ip addr add dev tun11 10.4.18.223/16 broadcast 10.4.255.255
Jun 17 19:56:10 openvpn[2852]: Ignore conflicted routing rule: 184.75.221.42 255.255.255.255
Jun 17 19:56:10 openvpn[2852]: /usr/sbin/ip route add 0.0.0.0/1 via 10.4.0.1
Jun 17 19:56:10 openvpn[2852]: /usr/sbin/ip route add 128.0.0.0/1 via 10.4.0.1
Jun 17 19:56:10 openvpn-routing: Configuring policy rules for client 1
Jun 17 19:56:10 openvpn-routing: Creating VPN routing table
Jun 17 19:56:10 openvpn-routing: Removing route for 0.0.0.0/1 to tun11 from main routing table
Jun 17 19:56:10 openvpn-routing: Removing route for 128.0.0.0/1 to tun11 from main routing table
Jun 17 19:56:11 openvpn-routing: Removing rule 1101 from routing policy
Jun 17 19:56:11 openvpn-routing: Adding route for 192.168.1.94 to 0.0.0.0 through VPN client 1
Jun 17 19:56:11 openvpn-routing: Completed routing policy configuration for client 1
Jun 17 19:56:11 openvpn[2852]: Initialization Sequence Completed
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