Some players are getting vanilla gather rates

Hi,
Not sure if this is in the right place but I need some advice if possible.

Today some of my players where reporting that instead of getting the server x4 rates, they were getting vanilla instead and I cant figure out why.

Ive done a little bit of testing with 3 other players and myself and 3 out 4 or our rates were as intended.
I've checked our plugins configs and they are fine but there seems to be a few players that are getting vanilla rates maybe even worse.

we were testing on rocks and trees and where as I was getting 3/4k wood and stone the other player was only getting around 360 wood and stone which doesnt make sense for a moddeed x4 server rate.

If anyone can give me some troubleshooting tips on what to try as this is the first time I've experienced this kinda thing in the time running servers, it would be much appreciated 

Thanks

What plugin you are using for rates, provide us it's configuration as well.
We have been using Gather Manager along with ZLevels Remastered seemlessly for the best of 12months, I dont think it is a plugin issue but I could be wrong.

Gather Manager:
{
  "Messages": {
    "Dispensers": "Resource Dispensers",
    "Excavators": "Excavators",
    "HelpText": "/gather - Shows you detailed gather information.",
    "HelpTextAdmin": "To change the resources gained by gathering use the command:\r\ngather.rate <type:dispenser|pickup|quarry|survey> <resource> <multiplier>\r\nTo change the amount of resources in a dispenser type use the command:\r\ndispenser.scale <dispenser:tree|ore|corpse> <multiplier>\r\nTo change the time between Mining Quarry gathers:\r\nquarry.tickrate <seconds>",
    "HelpTextMiningQuarrySpeed": "Time between Mining Quarry gathers: {0} second(s).",
    "HelpTextPlayer": "Resources gained from gathering have been scaled to the following:",
    "HelpTextPlayerDefault": "Default values.",
    "HelpTextPlayerGains": "Resources gained from {0}:",
    "InvalidArgumentsDispenserType": "Invalid arguments supplied! Use dispenser.scale <dispenser:tree|ore|corpse> <multiplier>",
    "InvalidArgumentsGather": "Invalid arguments supplied! Use gather.rate <type:dispenser|pickup|quarry|survey> <resource> <multiplier>",
    "InvalidArgumentsMiningQuarrySpeed": "Invalid arguments supplied! Use quarry.rate <time between gathers in seconds>",
    "InvalidDispenser": "{0} is not a valid dispenser. Check gather.dispensers for a list of available options.",
    "InvalidMiningQuarrySpeed": "You can't set the speed lower than 1 second!",
    "InvalidModifier": "Invalid modifier supplied! The new modifier always needs to be bigger than 0!",
    "InvalidResource": "{0} is not a valid resource. Check gather.resources for a list of available options.",
    "MiningQuarries": "Mining Quarries",
    "ModifyDispenser": "You have set the resource amount for {0} dispensers to x{1}",
    "ModifyMiningQuarrySpeed": "The Mining Quarry will now provide resources every {0} seconds.",
    "ModifyResource": "You have set the gather rate for {0} to x{1} from {2}.",
    "ModifyResourceRemove": "You have reset the gather rate for {0} from {1}.",
    "NotAllowed": "You don't have permission to use this command.",
    "Pickups": "pickups",
    "SurveyCharges": "Survey Charges"
  },
  "Options": {
    "ExcavatorBeltSpeedMax": 0.1,
    "ExcavatorResourceModifiers": {},
    "ExcavatorResourceTickRate": 3.0,
    "ExcavatorTimeForFullResources": 120.0,
    "GatherDispenserModifiers": {
      "Flesh": 4.0,
      "Ore": 4.0,
      "Tree": 4.0
    },
    "GatherResourceModifiers": {
      "*": 4.0
    },
    "MiningQuarryResourceTickRate": 5.0,
    "PickupResourceModifiers": {},
    "QuarryResourceModifiers": {},
    "SurveyResourceModifiers": {}
  },
  "Settings": {
    "ChatPrefix": "Gather Manager",
    "ChatPrefixColor": "#008000ff"
  }
}​

ZLevels Remastered

{
  "CUI": {
    "Bounds": {
      "HeightLower": "0.022",
      "HeightUpper": "0.15",
      "WidthLeft": "0.70",
      "WidthRight": "0.830"
    },
    "BoundsBackground": "0.2 0.2 0.2 0.2",
    "cuiEnabled": true,
    "FontColor": "0.74 0.76 0.78 1",
    "FontSizeBar": 13,
    "FontSizeLevel": 12,
    "FontSizePercent": 11,
    "TextShadowEnabled": true,
    "XpBarBackground": "0.1 0.1 0.1 0.1",
    "XpBarColors": {
      "A": "0 0.8 0 0.5",
      "C": "1 1 0 0.5",
      "M": "0.8 0.1 0 0.5",
      "S": "0.1 0.6 1 0.5",
      "WC": "0.6 0.3 0 0.5"
    }
  },
  "Functions": {
    "CollectibleEntitys": {
      "corn-collectable": true,
      "diesel_collectable": true,
      "halloween-bone-collectable": true,
      "halloween-metal-collectable": true,
      "halloween-stone-collectable": true,
      "halloween-sulfur-collectible": true,
      "halloween-wood-collectable": true,
      "hemp-collectable": true,
      "metal-collectable": true,
      "mushroom-cluster-5": true,
      "mushroom-cluster-6": true,
      "pumpkin-collectable": true,
      "stone-collectable": true,
      "sulfur-collectable": true,
      "wood-collectable": true
    },
    "enableCollectiblePickup": true,
    "enableCropGather": true,
    "enableDispenserGather": true
  },
  "Generic": {
    "enableLevelupBroadcast": false,
    "enablePermission": false,
    "excludeChainsawOnGather": false,
    "excludeJackhammerOnGather": false,
    "exludeWeaponsOnGather": false,
    "gameProtocol": 1956,
    "penaltyMinutes": 10,
    "penaltyOnDeath": true,
    "permissionName": "zlevelsremastered.use",
    "permissionNameXP": "zlevelsremastered.noxploss",
    "playerCuiDefaultEnabled": true,
    "playerPluginDefaultEnabled": true,
    "pluginPrefix": "<color=orange>ZLevels:",
    "wipeDataOnNewSave": true
  },
  "NightBonus": {
    "broadcastEnabledBonus": true,
    "enableNightBonus": true,
    "logEnabledBonusConsole": true,
    "PointsPerHitAtNight": {
      "A": 20,
      "M": 20,
      "S": 20,
      "WC": 20
    },
    "ResourcePerLevelMultiplierAtNight": {
      "A": 2,
      "M": 2,
      "S": 2,
      "WC": 2
    }
  },
  "Settings": {
    "CraftingDetails": {
      "PercentFasterPerLevel": 5,
      "TimeSpent": 1,
      "XPPerTimeSpent": 1
    },
    "DefaultResourceMultiplier": {
      "A": 1,
      "M": 1,
      "S": 1,
      "WC": 1
    },
    "LevelCaps": {
      "A": 100,
      "C": 20,
      "M": 100,
      "S": 100,
      "WC": 100
    },
    "PercentLostOnDeath": {
      "A": 100,
      "C": 50,
      "M": 100,
      "S": 100,
      "WC": 100
    },
    "PointsPerHit": {
      "A": 10,
      "M": 10,
      "S": 10,
      "WC": 10
    },
    "ResourcePerLevelMultiplier": {
      "A": 0.5,
      "M": 0.5,
      "S": 0.5,
      "WC": 0.5
    },
    "SkillColors": {
      "A": "#42cc00",
      "C": "#ffff00",
      "M": "#ff0011",
      "S": "#2aacff",
      "WC": "#4e1f00"
    }
  }
}