I, of course, have a high amount of books on my list, although I usually manage to keep it under 190.  Right now, my list is at 188.  I just tried to add a book to my WL and got the popup "This book was not added to your Wishlist."  etc etc 200 etc etc.

Now, it's been awhile since I got my math degree, but pulling on my ancient memories, 188 != 200.  In fact, 188 < 200.  By 12.

Anyone else have this problem?  Could there be glitched books sitting on my WL that I cannot see?

Make sure the book your trying to wishlist isnt actually posted. I dunno if it still does that but when the limit was created I got that pop up once when I only had a little over 100 books on my list.

This came up not too long ago, and I think that the answer was that you might have 200 titles on your wishlist, but only 188 authors?  In other words, if you sort your wishlist by author the count at the top is the number of authors on your list, and if you sort it by title, the number is the true number of individual books on your list.