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You're not doing anything wrong, package version and driver version are not always the same.
Expand out the O/S columns here: http://www.intel.com/content/www/us/en/support/network-and-i-o/wireless-networking/000005559.html
This message was posted on behalf of Intel Corporation
CharlesKorecki, Recommended Settings for 802.11n Connectivity
What Gize2 informed you is correct as you can confirm through the online document he has posted.
Intel recommends to obtain the latest drivers from the computer manufacturer first as they may contain features and customization made specifically for this adapter installed in this particular system if the adapter is installed by factory.
You may find your computer manufacturer information through this link: Computer Manufacturer Support Websites
In order to help you further, here are some other tips that might help you improve your experience.
Quick Checks to Improve or Fix Wireless Connection Issues
Recommended Settings for 802.11n Connectivity
Let us know if you need any more of our assistance as we are more than glad to assist you.