Normally, holding the control key while clicking on a location will cuse your demigod to move to that location instead of attacking what is under the cursor. This works when mousing over creeps but if you mouse-over an opposing Demigod and control click you will attempt to attack them instead of moving to that location.
This is especially problematic for ranged classes with melee spells like fire-mode Torch Bearer because they are unable to easily move to point-blank range of opposing Demigods (for spells such as Ring of Fire).