In your Catholic Encyclopedia source, newadvent.org we find a bit of controversy over the topic.
One example found in http://www.newadvent.org/cathen/07452b.htm
reads,
“Bellarmine and Baronius followed Pighius in denying that Honorius was condemned at all.”
So wherein does your argument find such force, with Saint Robert Bellarmine, Doctor of the Church in such opposition, (according to your own source, to boot!)?
Well, I am not a historian of the period, but the actual text of the Acta suggest to me that the great St. Robert Bellarmine erred in his historical assessment.
“To Honorius, the heretic, anathema!!”
That is a classic condemnation formula.