I found something that tries to explain the memory speeds that we are getting. In the A64 101 link, down towards the middle of the first page:
http://www.ocforums.com/showthread.php?t=306418
"What complicates what multiplier and HTT speed you should use are the CPU/memory dividers. No motherboard allows you to manipulate them directly. Instead, they provide “maximum memory clocks,” or supposed HTT/memory ratios. Make no mistake, no such thing exists. The memory is derived off of the CPU speed, but it’s never made clear, and the dividers need to be manipulated indirectly. Also, CPU/mem dividers are integral only; there are no half dividers, so it’s advisable not to use half multipliers...."
"To find the dividers mathematically, use the formula CPU Multiplier/Ratio and take its celing (e.g. anything above 10.0 becomes 11, anything above 11.0 becomes 12, etc). Formula found by Hitechjb1 from the Overclockers Forums."
So, in your case we would take muliplier of 9 divided by 5/6 (.83) or 9 * 6/5 to get 10.8 and then round up to 11, which we see on your cpu-z memory screen as CPU/11 and then gives you your true memory speed of 247.7
In my case we get 13.2 (11/.83 or 11 * 6/5) and round up to 14, which matches my memory screen shot and gives a true memory speed of 184.7
So far I can't find anything wrong with cpu-z 's numbers, so I'm just going to trust them in the future. This is weird stuff, I kinda understand it but it's making my head hurt