This ban was issued for stealing items from a different player. I was never aware of the previous scenario until after I banned you.
Since I became an Admin we have installed the /prism plugin and the logs have been collected ever since. The player who contacted me thought the person responsible was the player he was living with. However, when I inspected the armor stands using "/pr i", the logs repeated your name as the one that used the armor stands to steal the items.
The final proof I needed was gained after using /seen to find the location that you logged out at. After teleporting to that location I noticed that I only moved to the corner of the same room. That proved that the last place you were was the location that the prism logs said you stole items.
I'm fairly sure that this is firm proof that you were involved in stealing the items from the armor stands. As for how you did it in a claimed area, it’s simple. By shift right-clicking the area of the stands that holds the item you can place/remove/exchange the armor you are wearing with the ones on the armor stand.
Bibliocraft is a mod that loves to emphasize the use of GUI-less block interaction. It is great for quick use and awesome gameplay, but it come at the price of being susceptible to theft, as the blocks aren't protected by grief prevention and claims.
The decision from this point is up to @MACMAN.