I had 3.3.4. I clicked check for updates, it recommended 3.3.5. After install, I clicked check for updates, it recommended 3.3.6. I installed that one too. Why

I had 3.3.4. I clicked check for updates, it recommended 3.3.5. After install, I clicked check for updates, it recommended 3.3.6. I installed that one too. Why did it not just suggest 3.3.6 from the start?