Should throttle policy settings be merged with default config?

[ProNotion]

I have the following in my web.config

<throttlePolicy limitPerSecond="2"
                  limitPerMinute="6"
                  limitPerHour="18"
                  limitPerDay="36"
                  limitPerWeek="100"
                  ipThrottling="true"
                  clientThrottling="true"
                  endpointThrottling="true" />

On one particular API controller action I have the following attribute:

[EnableThrottling(PerSecond = 2, PerMinute = 3)]

After 3 attempts to hit the endpoint within 3 minutes the throttle is applied but not just for the current user but for everyone. Does the attribute need to explicitly apply the ipThrottling boolean or should it inherit the config from the web.config and simply override the attributes set on the controller action?