i registered website with google webmaster but the keword list they give with page ranking are most wrong when i check there is no my website link any where any one else also faced same problem..
the keyword list they give is not taken from the google search engine. they come out of your own website. it is the list of keywords they feel they are more relevant to your blog. mostly they come from tags or categories.try to use a keyword many times and you will see the keyword will come to the top places in the google webmaster keyword check. hope i've helped you