Nope not that at all! It actually looked like this in development:
Demo build ---------->cert----->release
Launch build --------------->cert------>release
Early Access build ----------------->cert------>release
Day 1 patch -------------------------------->cert-------->release
The launch build was always going to be updated, but it's important to get the FULL game to certification for Sony and MS to test in it's entirety.
So basically every chance we get, we prioritized the most important work and often had to replicate it up to four times to ensure the fix was implemented everywhere. It's a ton of work, with thousands of fixes/changes being added at each step. Does that help explain it a bit?