Seeing your admin xml file would help.
Its a normal default serveradmin file, i copied and pasted below.
<?xml version="1.0" encoding="UTF-8"?>
<!--
This file holds the settings for who is banned, whitelisted,
admins and server command permissions.
Steam ID can be found using
http://steamid.co/
STEAM ID INSTRUCTIONS:
===============================================================
You can find the SteamID64 of any user with one of the following pages:
https://steamdb.info/calculator/, https://steamid.io/lookup, http://steamid.co/
http://steamid.co/ instructions:
Input the player's name in the search field. example: Kinyajuu
If the name doesn't work, you can also use the url of their steam page.
Also you may add/remove admins, mods, whitelist, blacklist using in game commands.
You will want the STEAM64ID. example: 76561198021925107
PERMISSION LEVEL INSTRUCTIONS:
===============================================================
permission level : 0-1000, a user may run any command equal to or above their permission level.
Users not given a permission level in this file will have a default permission level of 1000!
COMMAND PERMISSIONS INSTRUCTIONS:
===============================================================
cmd : This is the command name, any command not in this list will not be usable by anyone but the server.
permission level : 0-1000, a user may run any command equal to or above their permission level.
Commands not specified in this file will have a default permission level of 0!
EVERYTHING BETWEEN <!- - and - -> IS COMMENTED OUT! THE ENTRIES BELOW ARE EXAMPLES THAT ARE NOT ACTIVE!!!
-->
<adminTools>
<admins>
<!-- <admin steamID="76561198021925107" permission_level="0" /> -->
</admins>
<permissions>
<!-- <permission cmd="dm" permission_level="0" /> -->
<!-- <permission cmd="kick" permission_level="1" /> -->
<!-- <permission cmd="say" permission_level="1000" /> -->
<permission cmd="chunkcache" permission_level="1000" />
<permission cmd="debugshot" permission_level="1000" />
<permission cmd="debugweather" permission_level="1000" />
<permission cmd="getgamepref" permission_level="1000" />
<permission cmd="getgamestat" permission_level="1000" />
<permission cmd="getoptions" permission_level="1000" />
<permission cmd="gettime" permission_level="1000" />
<permission cmd="gfx" permission_level="1000" />
<permission cmd="help" permission_level="1000" />
<permission cmd="listplayerids" permission_level="1000" />
<permission cmd="listthreads" permission_level="1000" />
<permission cmd="memcl" permission_level="1000" />
<permission cmd="settempunit" permission_level="1000" />
</permissions>
<!-- ONLY PUT ITEMS IN WHITELIST IF YOU WANT WHITELIST ONLY ENABLED!!! -->
<!-- If there are any items in the whitelist, the whitelist only mode is enabled -->