The Systematic Theologies dataset provides references according to Patristics and Medieval. The Confessional dataset does not. It provides a very limited “ecumenical” section. Why is there not a section for early church and medieval?
Ad exemplum, to find a reference to Matthew 16:17 at the Second Council at Orange in 529, I have to look at Modern Catholic under the fourth volume of A History of the Councils of the Church.
Also, the term Ecumenical is anachronistic. I would expect documents from ecumenical discussions in this section (if Logos carried them).