I Just Duped!

So I was buying def with life, I bought some def, and realized im maxed on this warrior, better give the life to my sorc so I can max its def.
So I go to my vault, put my life back, pick my ggen and acclaim back up and press 'o' and 'back to home.' Then I click my sorc, go to vault, and there's no life and just the acclaim+ggen that was there earlier.
So I hop on the warrior thinking the swap didn't work properly, and to my surprise, the acclaim and ggen is there. I go to my vault, it is also there.
I duped a ggen and acclaim on accident and am trying to reproduce the dupe I did on accident.
Tl;dr
Step 1: Have item, swap for other items in vault.
Step 2: Once swapped instantly press o, and switch characters.
Step 3: Go back to your vault and see if the items are there, then if they are, go on your other character to see if they are there also.



Edit: Tried to do it with my mad lab set for my sorc and it wiped my sorc gear, but I duped 3 mana..
I keep trying to do the same thing and its not working, maybe you can only do it once per character? (I did it once on my Warrior, once on my Sorc)

When it wipes your items, it reverse dupes, so to say. You vault doesn't update when you put it in, but your inv does. Or Vice-versa

On what server was it? usw?

Funny how I accidentally duped a Pyra yesterday, only to realize about it today. Gee, I'm dumb.

Were you using a client of some sort or just plain Rotmg?

i too thnk i duped treasure lo.. something like account in use then it got dupe lol.. xD

Isn't working. I tried on different characters and different servers under different conditions. None of them worked.

Edit: Just duped csword and life.

Works for me.
EDIT: duped some pots and lost nothing so far

Can't seem to get it to work, instructions a little unclear.