VIP permission not working for me

Hi. I have added vip permission config like stated in the documentation. Aparently its not working for me. the tools did not follow the setting as per permission setting but still following settings from below

"RemoveType - Normal - Entity Spawned Time Limit - Enabled": true,
"RemoveType - Normal - Entity Spawned Time Limit - Cannot be removed when entity spawned time more than it": 300.0,

I want VIP able to remove within 900 seconds and Normal within 600 seconds. But when i change the details from the permission the  plugin did not capture correctly (still showing 300 seconds). Below is my premission config.

"Permission Settings (Just for normal type)": {
"removertool.normal": {
"Priority": 2,
"Distance": 3.0,
"Cooldown": 60.0,
"Max Time": 600,
"Remove Interval (Min = 0.2)": 0.8,
"Max Removable Objects (0 = Unlimited)": 50,
"Pay": true,
"Refund": true,
"Reset the time after removing an entity": false
},
"removertool.vip": {
"Priority": 1,
"Distance": 3.0,
"Cooldown": 30.0,
"Max Time": 900,
"Remove Interval (Min = 0.2)": 0.5,
"Max Removable Objects (0 = Unlimited)": 0,
"Pay": false,
"Refund": true,
"Reset the time after removing an entity": false
}
},

I give the VIP group the necessary permission and tried to play around with the priority, that also did not work. 

I found out that the VIP permission doesn't have the ability to edit the Entity Spawned Time Limit. Those are only global settings

Is there any way I can add this features for VIP?