Hmmm.. good question.. I see same thing in features as you do.. maybe the site would have more information. Your browser can keep a history for you .. tho..
It looks to me that it only has the capability to record websites accessed by computers controlled by the Parental Controls. Computers that aren't controlled by the parental controls would not have their browsing history recorded by the router.
My Computer
At a glance
Windows 7 Ultimate x64Intil i7-86016Gb Corsair XMS3 1600MHzMSI N470GTXTwin FrozR II
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Self Built
OS
Windows 7 Ultimate x64
CPU
Intil i7-860
Motherboard
Gigabyte GA-P55a-UD6
Memory
16Gb Corsair XMS3 1600MHz
Graphics Card(s)
MSI N470GTXTwin FrozR II
Monitor(s) Displays
Samsung S23A700D
Hard Drives
1x Samsung 840Pro SSD 256Gb for Windows
2x WD Green 2Tb (for Storage)
1x Western Digital Caviar Black 2 TB 7200 RPM (also for storage)
1x Samsung HD501LJ 500Gb for Ubuntu