Bug #1; Just like the last mammoth must have thought: cannot reproduce. Everything works and I made two useless posts to prove it. You can see the images are stored on the JGO server. Only [IMG] (img tag with capitals) fails to be picked up, but shows up on your post as a direct reference to the original resource. Nobody uses [IMG] anyway.
In case you had a problem with image retrieval, it’s very likely that to access the image, you needed some cookie (like in gmail / attachments, or websites being strict about embedding images, verifying the referer in the http header) in that case, only you can view the image, so posting it on JGO will lead to a failure to download to the JGO server, just like everybody else would be unable to see your image.
As for Bug #2: known bug, reported before. I’m not sure I’m going to put much effort into it. Nobody but Roquen uses the wiki, and I hope he can live with this bug