Why would ceiling fan reverse air flow without me changing directions?
Most ceiling fans have a reverse switch. In the summer, you want cool air blowing down in the center to give you the breeze. In the winter, you want the warm air from the ceiling to mix with the rest of the room, but without the breeze, so you reverse it and the warm air descends around the sides of the room where you're less likely to feel the draft.

If yours is reversed, then I'd suggest looking a little harder for the switch. It's often on the fan itself when they have the pull chain. However, with yours, I'm going to guess it's on a separate controller. If it's not a dedicated button, you might have to hold a button for a few seconds or some other trick (this is why I never throw out manuals).