I'm not sure why you only unclip with one foot (you may have a reason mentioned in another post I haven't read), but you should probably practice with both. I have been in a few situations where I've come thisclose to a crash because I couldn't unclip on my usual side (i.e. being on the very edge of a slope with the drop off on the side where I usually unclip, forcing me to unclip on the other to take my weight to that side so I don't tumble down the hill), so practicing with both sides has been really important to me.
“Hope is the thing with feathers, that perches in the soul, and sings the tune without words, and never stops at all.”
- Emily Dickinson