Yeah, that does seem sort of counter-intuitive. But air is still getting in through the one, uncovered air snorkel.
While a lot of air is good, air that's turbulent isn't. A good analogy is water going down a drain. If the water above the drain is calm, it will flow smoothly into the drain. However, if the water is bubbling, tossing and turning or otherwise...er... turbulent, yaeh that's the word. Then the water has a harder time entering the drain. Some engineers would even argue a smaller volume of water will get into the drain. Another example is jet engines (as in planes). While they need to suck in air to operate, they can "flame out" if they get overrun with "too much air" or violently (again that word) turbulent air (say from the jet was of another jet).
This is part of the science the new ram air duct have undergone. As with so much in life, too much of anything isn't always good.
On another note SD, I was preparing my leathers to send to Alexa when I noticed an arm band :-[ Oops. I forgot to return this to you when I took the class. I'll pop it in the mail to you this week.