A player with a 15 day old VAC was able to join despite my settings being set to 30 days.

Config below
{
"Auto Kick": {
"Alts that have active bans on your servers": false,
"Bans on your network": false,
"Enable Total bans (server + game + vac) kick": false,
"Enabled": true,
"Max allowed previous bans": 3,
"Max allowed total bans (server + game + vac)": 30,
"Steam": {
"Family share accounts": false,
"Family share accounts that are dirty": false,
"Max allowed Game bans": 2,
"Max allowed VAC bans": 1,
"Min age of VAC ban allowed": 30,
"Min Allowed Steam Level (-1 disables)": -1,
"Private Steam Profiles": false,
"Profiles that do no conform to the Steam64 IDs (Highly recommended)": false,
"When Steam Level Hidden": false
},
"Users that have been banned on rusthackreport": false,
"VPN": {
"Enabled": true,
"Ignore nVidia Cloud Gaming": true
}
},
"Better Chat: Tag for dirty users": "",
"Broadcast": {
"Kicks": false,
"New bans": true,
"Player Reports": true,
"RCON": false,
"When VAC is younger than": 30
},
"Clan Ban": {
"Ban Native Team Members": false,
"Reason Prefix": "Assoc Ban -> {playerId}: {reason}"
},
"Discord": {
"Bans Webhook URL": "https://discord.com/api/webhooks/",
"Notify when a player has received a game ban": true,
"Send Ban Report": true,
"Send Kick Report": true,
"Send Only Dirty Player Reports": true,
"Show Quick Connect On report": true,
"Webhook URL": "https://discord.com/api/webhooks/"
},
"General": {
"Debug: Show additional debug console logs": false,
"Ignore Admins": true
},
"io.serverarmour.com": {
"Owner Email": "",
"Owner Real Name": "",
"Owner Steam64 ID": "",
"Server Key": "",
"Share details with other server owners": true,
"Submit Arkan Data": true
},
"Server Info": {
"Game Port": "",
"Query Port": "",
"RCON Port": "",
"Your Server IP": ""
},
"Show Protected MSG": true
}

I would need more information, can you provide examples? Steamids etc?