This is a suggestion -
Once the firmware has been downloaded and installed on the Data Center (running the latest version now) it seems to me that you should disable the ability to download the firmware again.
Gray the button out/disable the button once you’ve downloaded/installed the latest version for the Data Center.
AFAIK this is how it currently works. You shouldn’t be able to download and reinstall the firmware at all.
You are correct in that you can’t download and install again but the button isn’t disabled giving the impression that it can be redone over and over. Yeah, it’s a nitpicky request but it’s one of those things of just cleaning up the UI.