@OrangeStreet 

In short its a tiering effect, the rate limit at the network level will take priority over anything set at the device level if lesser..OR   whatever is the most restrictive

For example.. at network i set the limit as 5mbps, on the device as 10mbps..   i will get 5mbps..

Setting at the network is just easier all round, the device level is more for one off changes, usually for a single device and not something you would use for a lot of devices.    Eg one of the devices on the 5mbps network, set at devices fo 2mbps and it will then be restricted to 2mbps.

If you are happy with all devices on the network restriction, then its fine to just ignore the device level.  

However bear in mind, network level restricts will not only affect Internet access speeds, but speeds in general over the network (file copy, transfer, storage etc). 

Ok - so my goal is to ensure that any client (resident in my case) when they join the wireless network that they not be given any more than 10Mbps per client rate (download) so that no one person can kill the total internet bandwidth (which is 60Mbps at this time during testing). 

You can see from the edit screen of the wireless network in question that it implies that the rate is set "per client bandwidth usage" - if that is the case then doesn't that mean their Internet bandwidth is rate limited on a per client basis? - please see the below screenshot - key part circled in red

  @OrangeStreet 

Yes, it means every client connected to this wifi will be limited according to the bandwidth you set up. No need to do bandwidth control on clients list one by one.