Yes when you manage to KO someone while taunting them, you get praised, and when you get knocked out while taunting you get criticised for being an idiot, it doesn't change the fact he was taunting and not fighting seriously both times. Its not confusing.
I just rewatched the fight. Apart from the early take down and limited GNP, Silva spent the rest of the fight from mid RND 1, taunting Chris by standing right infront of him with his hands down. If you think that is Silva fighting seriously you need your head examined. All Chris proved in that fight is that he was good enough to catch someone who had their hands down taunting him for 5 minutes. Whether Silva managed to win 100 previous fights while taunting is irrelevant totally.