I was in the arena, I took the 10 gems and it gave me 5 gems

(At first, I tough it was like someone else took it but no, because if it was like that, it would have say so)

Here's proof:

Noticed how I had 5 gems at first and after I got that those gems, it went to 10 gems.


With my 5 gems

Code:
http://i.imgur.com/p98L8zs.jpg
After I got it

Code:
http://i.imgur.com/OO01Ef3.jpg


Thanks