Why was Eifert blocking Dumervil?

[masterpanthera_t]

Glad that we won after giving up the lead, but is anyone else wondering why Eifert was blocking Dumervil on the scoop and score play? While he may have improved his blocking (I don't know if this is true or not), why was he blocking one of the better DEs in the league on 3rd and long? This terrible decision almost cost the Bengals the game. Hope this kind of coaching decision-making gets fixed.