@kbulkar - if you have some issues/suggestions with the Quality Check plugin, can I suggest you post them on that plugin thread instead? It will make it easier for me to not forget them/respond there.
Author FN LN -> LN, FN - thats a fairly frequently topic. I suggest you do a search in the library management subforum, there is some useful information in the help pages about it. It is more complicated than it needs to be (imo) but Kovid knows I love prodding him about it every now and then
For goodreads metadata (or any other source for that matter) - I recommend you untick the "Title" and "Author" columns in the preferences for downloading metadata. That way your books will stay with the original title/authors you put into them in calibre, and not get corrupted if either by chance the metadata download gets the wrong book, or gets some bad capitalisation/omnibus edition or whatever that happend to come back first in the search results. You can change those preferences either from the edit metadata dialog of from Preferences->Metadata download.