It’s not an error from a developer, it’s the expected behavior, if you are on the RC build then updates are considered to be from the nightly builds (which is branched to 4.2-alpha at this point), this is how development processes work. The reason you’ve not noticed this before (it’s always been the case btw) is because we usually don’t branch this early but to keep the process going it makes sense to branch during RC so planning for the next release can begin.
At this point we are just going around in circles in this thread, it’s not productive at all so I will be closing it, if you have more questions about how the nightly builds work I welcome you to create a topic in a more appropriate sub-forum ??