CDN not being reconised!

[Kye]

First of here is a copy of a test without CDN

http://www.webpagetest.org/result/110620_62_W6K3/

I then activated it, for 95% of the images on the page

http://www.webpagetest.org/result/110620_ZS_W735/

My score went from 92 to 96 however I still get AAABAF

Why does it not reconise the CDN on most of images on the page?

Also, the page loads SLOWER sometimes now that I have a CDN then before. (lucky test, had 6.2 seconds before)

I will say before anyone needs to look, both cdn1 and cdn2 are hosted on the same server but are split to trick browsers into fetching the images faster.

How do i get the tester to recognize the CDN, the browsers do and so open up lots of extra connections to get the content.

Note: Serve resources from a consistent URL (53/100) - I know it's bad, but it is a limitation of the CMS I am using.

Any help is much appreciated.