If the principle of Unity dominates, one option is to subsume the two natures into one. There are two options:
a) Both natures are blended into one divine nature
(Monothelites);
b) both natures are blended into one physical nature
(Monophysites).
This "blending" is called "confusion" by the authors of the Reformed confessions. It indeed results in several kinds of confusions and wrong thinking regarding what nature Christ actually manifested and when it was manifested.