GTM: Topology Example

Hi,

I have the following example, two records as below at WideIP example.com, when I dig at "example.com" from 10.11.70.207, I was expecting to get only Pool_1 as answer, but I got round robin between both pools, based on this link it's not normal, but I don't know what I missed?! this behavior at two different versions (11.3, and 11.5)

LDNS Request Source                 Destination             Weight
IP Subnet is 10.11.70.207/32        Pool is Pool_1            100
IP Subnet is 10.11.70.0/24          Pool is Pool_2            100