MS didn't change the CB and CBB update scenarios until July 2017. It is now the semi-annual channel.
"Microsoft has updated its servicing model. The Semi-Annual Channel is a twice-per-year feature update release targeting March and September, and 18-month servicing timelines for each release. The Semi-Annual Channel replaces the Current Branch (CB) and Current Branch for Business (CBB) concepts starting July 2017 with Windows 10, version 1703. This page is designed to help you determine if your devices are up to date with the latest Windows 10 feature and quality updates and to plan deployment schedules."
As you can see in the listing, CBB was still on version 1607.
https://technet.microsoft.com/en-us/windows/release-info.aspxIf it is changed to current branch the problem should be eliminated, as Current Branch is the same as the Semi-Annual channel.
If you go to the option to defer updates, it simply states this:
"Choose the branch readiness level to determine when feature updates are installed. Current Branch means the updates are ready for most people, and Current Branch for Business means it's ready for widespread use in organizations."
CBB and CB had different update cycles.
The changes were suppose to have been made, but it seems the CBB is still running behind. The semi-annual channel is suppose to replace both CB and CBB. CB and CBB are on two different servers, offering different update schedules.
Has the the upcoming Creators Update changed the deferred process, to the semi-annual process?