You know how signatures normally show you all the BB code you used to create your signature? Well mine won't show that for some reason. I went on Edit Signature and all it shows is my signature in the final product. It shows this in the box you are meant to edit in.
There's a small button which resembles "A/A" mostly visible in internet explorer based browsers. I'm using a crome based one, I don't see it. You should be able to see your bb code if you revert to your original browser you could see the bb codes in.