Thanks for the post. This will help for cases where I have single artist. Some times, I have multiple artists separated by comma.
I am thinking to run one more action group as last one which will search for "Benny Benny" and replace with just one Benny. I have copule of them.
As I fix one problem with action, I am get side effects of the fix. However, I have lot of progress. I understood that some times I need to do in certain order. I am cleaning up all the mistakes I did while entering meta data.