Hi Jerome,
2. Let's say we have a product with 6 in stock. On the product page we can set the quantity to e.g. 14 and add it to the wishlist no problem, the wishlist will display a quantity of 14.
However, let's say we start over and first only add quantity of 2 to the wishlist, then go to the wishlist display page and there try to increase the quantity to 14, it doesn't work. After saving the wishlist, the quantity becomes 6 (the max. amount in stock) even though we entered 14.
So on the wishlist display page it does not allow the quantity to be higher than is in stock.
3. But it's quite strange to have the same product show up twice in the cart, right? For example, after moving product A from the wishlist to an existing cart, the cart can look as follows:
Product A - Quantity: 3
Product B - Quantity: 1
Product C - Quantity: 1
Product A - Quantity: 1
Shouldn't the product A simply show up once with a quantity of 4?