So I contacted iTunes help this morning:
My request:
iTunes music wish list disappeared. I purchased some songs last night and was going to purchase more this morning; however, my wish list of 40 - 50 songs disappeared on me. Can you please get a backup of my account from the past week and send me the list that disappeared? I appreciate your help. Or if I can fix it somehow let me know; however, I couldn't find anything online.
Apple's response (blah, blah, blah) (stating we don't care nor will we help you):
Hi Anthony, Thanks for contacting us. I understand that your iTunes Wish List has been disappeared. I can imagine that you’re anxious to resolve this issue. I’ll be working with you to resolve this issue for you.
Anthony, I’d like to inform you that, to have your iTunes Wish List you’ll need to rebuild your Wish List and add items to it.
To add items to your Wish List, please follow the steps given below:
On iPhone, iPad, and iPod touch:
1. Tap iTunes Store or App Store.
2. Locate an item you want.
3. Tap the Share icon.
4. Tap Add to Wish List.
On Mac and PC
1. Open iTunes and go to the iTunes Store.
2. Sign in with your Apple ID, if you aren't signed in already.
3. Locate an item you want, then click on the item to be taken to the item's page.
4. Click the arrow to the right of the Buy button (under the image), then select "Add to Wish List."
If there is any further assistance I can offer you for this issue, please feel free to reply to this email. Take care, and enjoy the rest of your day.
Thanks,
Hyder iTunes Store Customer Support