Player chat without title followed by chat with title. Double chat no other chat mods, nogreen not installed. The only one on the server it does not double chat is myself. Joinded Mvp group and no double chat, maybe because i belong to admin group not default

[{
  "GroupName": "Survivor",
  "Priority": 10,
  "Title": {
    "Text": "[SURVIVOR]",
    "Color": "#55aaff",
    "Size": 15,
    "Hidden": false,
    "HiddenIfNotPrimary": false
  },
  "Username": {
    "Color": "#55aaff",
    "Size": 15
  },
  "Message": {
    "Color": "white",
    "Size": 15
  },
  "Format": {
    "Chat": "{Title} {Username}: {Message}",
    "Console": "{Title} {Username}: {Message}"
  }
}, {
  "GroupName": "Veteran",
  "Priority": 9,
  "Title": {
    "Text": "[VETERAN]",
    "Color": "#ad7ff6",
    "Size": 15,
    "Hidden": false,
    "HiddenIfNotPrimary": false
  },
  "Username": {
    "Color": "#55aaff",
    "Size": 15
  },
  "Message": {
    "Color": "white",
    "Size": 15
  },
  "Format": {
    "Chat": "{Title} {Username}: {Message}",
    "Console": "{Title} {Username}: {Message}"
  }
}, {
  "GroupName": "MVP",
  "Priority": 8,
  "Title": {
    "Text": "[MVP]",
    "Color": "#c02519",
    "Size": 15,
    "Hidden": false,
    "HiddenIfNotPrimary": false
  },
  "Username": {
    "Color": "#55aaff",
    "Size": 15
  },
  "Message": {
    "Color": "white",
    "Size": 15
  },
  "Format": {
    "Chat": "{Title} {Username}: {Message}",
    "Console": "{Title} {Username}: {Message}"
  }
}, {
  "GroupName": "MVP*",
  "Priority": 7,
  "Title": {
    "Text": "[MVP*]",
    "Color": "#623053",
    "Size": 15,
    "Hidden": false,
    "HiddenIfNotPrimary": false
  },
  "Username": {
    "Color": "#55aaff",
    "Size": 15
  },
  "Message": {
    "Color": "white",
    "Size": 15
  },
  "Format": {
    "Chat": "{Title} {Username}: {Message}",
    "Console": "{Title} {Username}: {Message}"
  }
}, {
  "GroupName": "default",
  "Priority": 20,
  "Title": {
    "Text": "[Player]",
    "Color": "#55aaff",
    "Size": 15,
    "Hidden": false,
    "HiddenIfNotPrimary": true
  },
  "Username": {
    "Color": "#55aaff",
    "Size": 15
  },
  "Message": {
    "Color": "white",
    "Size": 15
  },
  "Format": {
    "Chat": "{Title} {Username}: {Message}",
    "Console": "{Title} {Username}: {Message}"
  }
}, {
  "GroupName": "MVP**",
  "Priority": 6,
  "Title": {
    "Text": "[mvp**]",
    "Color": "#2a752e",
    "Size": 15,
    "Hidden": false,
    "HiddenIfNotPrimary": false
  },
  "Username": {
    "Color": "#55aaff",
    "Size": 15
  },
  "Message": {
    "Color": "white",
    "Size": 15
  },
  "Format": {
    "Chat": "{Title} {Username}: {Message}",
    "Console": "{Title} {Username}: {Message}"
  }
}, {
  "GroupName": "MVP***",
  "Priority": 5,
  "Title": {
    "Text": "[mvp***]",
    "Color": "#a469fd",
    "Size": 15,
    "Hidden": false,
    "HiddenIfNotPrimary": false
  },
  "Username": {
    "Color": "#55aaff",
    "Size": 15
  },
  "Message": {
    "Color": "white",
    "Size": 15
  },
  "Format": {
    "Chat": "{Title} {Username}: {Message}",
    "Console": "{Title} {Username}: {Message}"
  }
}, {
  "GroupName": "MVP****",
  "Priority": 4,
  "Title": {
    "Text": "[mvp****]",
    "Color": "#ff7e00",
    "Size": 15,
    "Hidden": false,
    "HiddenIfNotPrimary": false
  },
  "Username": {
    "Color": "#55aaff",
    "Size": 15
  },
  "Message": {
    "Color": "white",
    "Size": 15
  },
  "Format": {
    "Chat": "{Title} {Username}: {Message}",
    "Console": "{Title} {Username}: {Message}"
  }
}, {
  "GroupName": "Builder",
  "Priority": 3,
  "Title": {
    "Text": "[Builder]",
    "Color": "#0000ff",
    "Size": 15,
    "Hidden": false,
    "HiddenIfNotPrimary": false
  },
  "Username": {
    "Color": "#55aaff",
    "Size": 15
  },
  "Message": {
    "Color": "white",
    "Size": 15
  },
  "Format": {
    "Chat": "{Title} {Username}: {Message}",
    "Console": "{Title} {Username}: {Message}ame}: {Message}"
  }
}]​

any help appreciated

Did also try with "HiddenIfNotPrimary": false set to true no diffference

Chat showing twice means you have two chat plugins sending the chat. No Green is a common culprit, but many send chat of their own for various reasons. You'll need to list or remove them to test and see.

The only other chat program was privite messages unloaded same problem. The funny part is as an admin this des not happen to my chat just the players

Unload all, keep only Better Chat, see what happens.

@wolf Unload found the problem. Turns out arena was the problem.