The “why?” is because they want to mess with your head. I’m guessing that is a change in R24, because I don’t remember seeing a prior version (at least through R22) that had the Objects dialogue box in that order. Unless I’m losing my mind it’s always been PSR as pictured below. And I don’t know of any preference setting to change it.
Also see absolutely no reason for this. I can tolerate sudden interface changes if they are either explained, or obviously beneficial. This has just been dropped on us without any care taken, as I can see.
I just hit the camera icon at the bottom of the reply window and dragged the screenshot into the resulting box. I think because it was a small screenshot it didn’t get cut off like larger ones will. The COW’s upload and display process has changed over the years and is sometimes less than optimal.