Open your roblox studio and navigate to My Games > Shared With Me
Change the sort order to Last Modified
In that exact screen, everything showing below will be in the opposite order of last modified:
In all other screens, like group games and my games, last modified shows in the proper order from most recently modified to oldest modified.
I am running MacOS operating system, I had my friend test it on his MacOS and he experienced the same issue. I am unaware if this issue exists for windows.