Buy Limits and Max Sell Amount

Help is needed. No one noticed for a year, here is my example config. A VIP player buys 250 cartridges in one stack and, in accordance with the limit, he can buy 100 times, for a total of 25 thousand cartridges. But for some reason it happens that if a player bought 2500 pieces once, then he can’t buy anymore, the limit is over. I tried it in different ways, but in other cases the purchase is unlimited. What am I doing wrong?

{
          "Type": "Item",
          "ID": -992666343,
          "Image": "",
          "Title": "",
          "Description": "",
          "Command (%steamid%)": "",
          "Kit": "",
          "Plugin": {
            "Hook": "",
            "Plugin Name": "",
            "Amount": 1
          },
          "DisplayName (empty - default)": "",
          "ShortName": "ammo.rifle",
          "Skin": 0,
          "Is Blueprint": false,
          "Amount": 250,
          "Enable item buying?": true,
          "Price": 100.0,
          "Enable item selling?": false,
          "Sell Price": 100.0,
          "Buy Cooldown (0 - disable)": 0.0,
          "Buy Cooldowns (0 - no limit)": {},
          "Sell Cooldown (0 - disable)": 0.0,
          "Sell Cooldowns (0 - no limit)": {},
          "Discount (%)": {},
          "Sell Limits (0 - no limit)": {},
          "Buy Limits (0 - no limit)": {
            "shop.vip": 100
          },
          "Daily Buy Limits (0 - no limit)": {},
          "Daily Sell Limits (0 - no limit)": {},
          "Max Buy Amount (0 - disable)": 0,
          "Max Sell Amount (0 - disable)": 1,
          "Force Buy": false,
          "Prohibit splitting item into stacks?": false,
          "Localization": {
            "Enabled": false,
            "Text (language - text)": {
              "en": "5.56 Rifle Ammo"
            }

Hi! I'm on your case.

Hi! Sorry for the long wait.
In order to limit how you want, you need to use the following parameters:

          "Buy Limits (0 - no limit)": {
            "shop.vip": 25000
          },
          "Max Buy Amount (0 - disable)": 1,

Changed Status from Pending to Closed