You even changed the author's title to one of your own choosing and then posted the article in its entirety.
If I am wrong, I will certainly apologize.
Slight changes to titles are common. Most website and blog owners do this. Once more you have spoken in haste without knowledge of how things are commonly done with respect to reposting of articles.
An apology is the least you can do in light of the baseless accusations you have cast upon the good name of the blog owner.