I have the same problem. Although I had the 11.3 RC installation pending in my System Preferences when it got released last Tuesday, I held off installing it because I needed to finish out my development activities on my current installation for that week. I had planned on installing 11.3 RC over the weekend, but to my dismay when I went to my System Preferences, it had already switched to the 11.4 beta 1 release. I even tried restoring my settings and downloading the developer profile again, but it kept coming up 11.4. I don't want 11.4 yet; I want 11.3 RC so I can release updated apps. So frustrating. I submitted a Feedback but report, but I get the feeling Apple no longer reads those items.
Topic:
App & System Services
SubTopic:
Core OS
Tags: