Yep, that's the one. Ok, And thanks for your help!

Mmm, so the images names were messed up, it seems they came from this
gallery :

http://baltosource.timduru.org/en/fanimage/adriana/1373.html&display30

But I can't see why
this happened. The next time you encounter a problem like this, please
give me a screenshot ("print screen")

Steet--> "Balto Calloge" had said "Request:for:timberwolf61" or
somethig like that, underneath it said"This was very fun I hope you
like it! " "Bandit" had said "bambam", and underneath it said "my
fusona no stealy!" and "Howling away..." had said "My Character
Tuson", underneath it said "I love Tuson! My favorite character. He is
exactly my fursona." Or at least something similar to that. The Bandit
one happened awhile ago, but I had just thought a mod had changed it
for whatever reason and didn't say anything about it except to my
parents. It only happened on the first page of my images gallery(30
images per page, but I don't have any fanarts. I don't know if it has
happened to anyone else.

Probably a bug, yes. Can you tell me which images exactly are
concerned? Did it happen on all the fanart pages (including the send
system) or only one particular page?
I need more information.

IF it has happend to other people already and since a long
time, why has no one told me that before?

Most likely a bug. It's happened to many peoples' galleries for the longest time.
Most of my images' titles and descriptions are messed up as well.

But yeah, like Mighty said, tell steet.

Before you say it was a hacker, tell Steet.