Help. How come, when I went online my pokes were on trade to "JelloMahinay09" but I was not able to take a screenshot of it

Tho i took a screenshot of my "Send Log", inbox and outbox

Sent Log
https://ibb.co/gpzRzx

This is my inbox
https://ibb.co/cOBs6c
He sent me a message saying "Hello"

This is my outbox
https://ibb.co/bWZemc
I sent Jello a message saying "Uyy Musta?" meaning "Hey How are you?" but he hasn't opened it yet. My latest pm to him is telling him to return all that was sent to him. This just shows that there was no conversation between us to stating that I'll give him coins and money

I think Jello has nothing to do with this or I might be wrong too.
This were the once sent to him...
5,000 coins JelloMahinay09 SageOfSixPaths April 03, 2018 8:14:54am
$1,000,000,000 JelloMahinay09 SageOfSixPaths April 03, 2018 7:37:34am
1,000 coins JelloMahinay09 SageOfSixPaths April 03, 2018 7:34:06am

I hope this gets fixed so that others may not experience this....I sold alot of my colored pokes so that I could gain more coins then this happend.

Jello returned the money and coins now :) Although how did this happened in the first place tho?