Yeah, there used to be unlimited editing at first, but that has been changed. If you can, whenever you can, use the .PNG image format instead of .jpg. It has much better clarity and is usually smaller in file size.

Unfortunately, there is no emoticon list. I have to enable Active Scripting in IE in order to use them, so I don't bother, and I'm not going to ad this site to my Trusted Site list because then I cannot avoid text ads. At least not without modifying my host file.
What you could do is enter the post mode and test them all, then create a list of key stroke input for future use.