Thanks for these suggestions we really value feedback as it helps us plan future enhancements and features for the site.
A revamp of the shopping list feature is high on our 'to do' list. Being able to delete recipes from the list will be included. Also adding and deleting other ingredients and quantities. The shopping list will also be a major part of the mobile phone application so that you always have it with you in a readable format.
Suggest when you're planning a menu that you create a Bookmark for it and add recipes to it as you go. Once it's final and you're ready to shop then add all the recipes to the shopping list.
You can exclude an author or book from your recipe searches by putting a minus sign before the name which should be in quotes - so:
-"silver palate cookbook"
If you only wanted to see recipes from this book then take away the minus sign.
Hope this is useful.