Well, that took about two days.
Here's how I fixed it.
I started at the top of my book list and went down it one by one. When I found a book that had an incorrect Cover, I did the following.
1- Note name of book that is shown on incorrect cover
2 While book is selected, hit "o" to open the containing folder. This gets you the number you need.
3- Navigate to book noted in 1
4- There should be two folders containing that book. Deleted the one with the number found in 2
I repeated for every book in my collection and now all the covers are correct.
whew... !
