The only command you need to know in tibia is...
So you could do this, if you see players with admin items then you do
You obviously do this in the chat while you have admin powers.
Then if the players level is too high you would just do...

<id> = player's id number
<level> = The desired level for the player
<itemid> = The number of the item.

Hello members,

I'm hosting my tibia server now for like 2 days,
And i'm having some trouble.
Some levels of some people were to high but i couldn't lower them. Some people got admin items but i dont know how to 'steal' them from their inventory(this happend to me on another server when i obtained an event only item, he took it out of my inventory).
So yesterday i came across an admin script for cs2d servers. So my question is if there is a sort of admin script for TIBIA servers so i can fully control my server the way i want.

PS: Is there a script or something that when i make changes like change the owner of a house that it reload that certain script instead of restarting the server the whole time?

Thanks in advance!