I did not test everything extensively, but I think there's a problem with the mobile website wish list. I added a bunch of things from my wish list to my cart to take advantage of the new website sale (thanks btw). I noticed as I did this that items disappeared from my wish list.
One of the items I wanted to buy (BECNT Romans 2nd, Moo) would not accept the coupon code, so I removed it from my cart. It did not go back into my wish list!
There are two ways to handle this: either wait to remove an item from the wish list until after it's been fully bought, or put back cart items into the wish list if I choose not to buy them.