What gameplay feature is this bug affecting?
Currency/GB Sales

What's the issue? Please include any error messages you receive and as much detail as possible.
So this has been happening on and off for a couple weeks now.

Whenever I sell GB I always do multiple batches (1-3) of 1gb. So I know exactly how much I am putting in every time. Lately whenever I do this I will notice that I am getting more sales then amount of gb I have listed. Today for example I listed two GB up separately for 699sb each and they both sold about 1 minute after I listed them at 12:26. At 12:41 I receive another message saying my listed GB was bought when I had not listed a third. The gb was taken out of my account and I did receive the sb.

The only difference this time was one of the first gb I had listed I cancelled a few seconds later but I dont think this has anything to do with the glitch. The other times this has happened I had not cancelled any listings.

Any links relating to this bug? For example, if a particular lion is bugging, what is the link to that lion?
n/a

Any screenshots you can provide us with?
yep!

The initial listing at 12:26 clicky

The additional listing at 12:41 that I did not make clicky

And then my GB overview clicky

Please provide us with step by step explanation how this bug happened so we can attempt to replicate it. If it's complex, please include screenshots where possible:
For this instance I listed 2 gb up separately one for 699sb and one for 700sb. I cancel the 700sb one and relist for 699sb. They both sell within a minute or two.

15 minutes later I get a notification that more GB has been sold despite me not listing another.

The only way I can think of this happening is if I was refreshing the page multiple times and it resubmitting but I have not been doing that