About Logic Pro still says 7.1.1 after successful 7.2 upgrade

deeper problems are indeed afoot. that is abnormal behaviour!

try completely uninstalling then reinstalling 7.2 directly?

Did you move your Logic app to somewhere other that /Applications, or rename it at all ?

Are you running Logic by directly opening the application, or are you double-clicking on song files?

Because either your upgrade installation failed and the app is still the 7.1.1 version, or the 7.2 app installed alongside the 7.1.1 app, and by using existing aliases on song associations, you are still running the 7.1.1 version. So what's in your Applications folder?

if you've had a history with os9, then you may be used to being able to move app files around to wherever you want. but something you should know about OSX is that applications should not ever be moved from the applications folder, nor placed inside a folder within that folder, unless that is how they placed themselves upon installation. if you mess with the placement at all, updates can also get messed up.

Yes, just overwrite the app. Apps should be in Applications.

The reason you get problems is the installers write package receipts when you install software, that log what was installed, what versions, and where for instance. When you run the updater, it looks at these receipts to work out what it needs to do - if you've moved the application post-install, the receipts can potentially confuse the updater.

In your case, 7.2.3 was installed in it's proper place (/Apps), but you were still running the old version which was in Apps/Audio.