Uploading bug/exploit

Recently, I discovered a bug that allow you to post images past your upload limit. Here how it works.
First, let's look at my initial upload limit, which is 50.
To begin, I open an upload tab to post an image and then, right after clicking the submit button, I open another upload tab while the first one is still processing, then I just keep uploading and repeating the same procedure.
After uploading 5 pics, I recheck my upload limit, here's the result.
As you can see, somehow the upload limit is only reduced by 4, which means I just posted 5 pics for the cost of 4!
Here's the upload limit after uploading 33 images.
Actually, this bug doesn't seem to work all of the time, so I'd be appreciated if anyone can try this bug and provide their result here.

Is it even desired from this site to exploit bugs that could..."damage" the web site. This turns the limit pretty useless.

A lot of the information on the user page is cached; did you try actually going past the limit doing that?

Gollgagh said:

A lot of the information on the user page is cached; did you try actually going past the limit doing that?

I think you can check my uploaded images. For example, I uploaded a total of 73 images on February 19 before exhausted my upload limit.

Also, as Provence has said, this bug seems very broken, so I hope it will get fixed soon.

Edit: Here's the tag search