Here's the reply I received, hope this helps!
-----
That shouldn't be that way. If I, or someone else had put it together, or if the factory sent it that way, it should be reconfigured. It's not an issue that you can differentiate though, you can't tell the difference on performance (unless your really into extreme diving, way beyond recreational limits). But I do recommend changing it.
The HFPort, because of physics, is designed that it provides as much as 15% greater flow through that port. This isn't obviously needed on the inflator hose side. They didn't necessary make it that way on purpose at first, it just naturally was an advantage when the compact size was designed.
What makes the MK16 special besides that it is very great performance in a small size and extreme environments, is the flow rates. The MK16 flows at 177 SCFM (that's 177 cu. ft/min squared)!! No other diaphragm style in the world even comes close to that!! I'm serious, it's a remarkable achievement. (Most hope to get 100-110 CFMS - even some very high end - Atomic for example, can only achieve that). That really provides extra comfort on multiple breathers, deep dives, heavy currents, etc.
-----
