SimSeeker How did you go to CAS? Did you go via Manage Households or via a dresser or mirror? Or did you go using one of the buttons you can click in the sim's simology panel? I suspect you used one of the Go to CAS buttons in the sim's simology panel because what you got with not being able to download from the Gallery and no body or face button is from going to CAS that way.
If you didn't know, there is more than one version of CAS in the game that have slightly different options. Why, idk, but there are. You get full CAS when you go there via Manage Households or using a dresser or mirror. You get an abbreviated version of CAS when you go there via one of the two Go to CAS buttons in a sim's simology panel. IOW, nothing is wrong, that's how the game normally works. Btw, if you use the cas.fulleditmode cheat prior to hitting a Go to CAS button, you get full CAS instead of the abbreviated version.
As for the other issue with the stacking aspiration and age panels in the upper left of the screen, I had that too when I went to CAS using one of the Go to CAS buttons in the sim's simology panel. But it was easily fixed by clicking on the plumbbob button in the upper left corner. Once I clicked the button, the panels fixed themselves and displayed correctly. It can be annoying and it's technically a bug but it's not a game breaker. It didn't happen when I went to CAS via Manage Households.
Hope this helps.