@MeganFord1213 It looks like what happened is, you or Origin made a new Sims 3 folder inside the one in Applications and installed those two packs into it. I don't actually know what would happen if you moved the originals of Supernatural and University Life into the AddOns folder where all of your other packs are installed. Program files can't be moved from one drive to another, but this might only count as a reorganization, with the files themselves staying put. You could try it, of course. Worst case, you manually uninstall those two packs and try to install them again, first trashing the extra Sims 3 folder next to your base game alias.
(You can also trash those empty Contents folders—the one in your latest screenshot, and the one in the folder with all the other aliases.)
I'm not surprised you can't open the Sims 3 file inside the extra folder, since the base game can't be installed there in the first place. (The base game is about 6.1 GB.) Once you've tried moving the files for Supernatural and University Life, it's probably best to delete the contents of this extra folder, and then the folder itself. Make sure you right-click and select Move to Trash, or you'll only move an alias.
Also, it's sweet of you to offer me a gift card, but that's not necessary. I help people because I enjoy doing so, and because when I wanted to install the game on my new computer a year ago, I received a lot of help myself. (That's how I learned to do all this.) So I'm happy to help for its own sake, and knowing that I contributed to getting this wonderful (if maddening at times) game running for someone else is really all the thanks I need.