FYI, I had the same issue some time ago with one key.
Got very good handling by DSI Technical Support even if I'm located in Belgium far from US West coast ;-)
First my Pro2 has been exchanged by the shop and it has been a bit better but got the issue again.
Following DSI Technical support, I opened the Pro2 several times, removed the key with issue, blew some air, massaged the sensor rubber but the issue was coming back each time.
At the end they sent me a replacement keyboard that I replaced myself and since then it is fine.
My message is: contact support and follow their advises/instructions.
It is also very easy to open and replace parts in the Pro2. No rocket science ;-)
Good luck!