OK, here is an update: I just came back from the "Tire & Wheel Performance Center" located in Ridgewood, right off Rte 17 South and everything is ok. The valve of the front left tire was completely loose...and so was the one from the front right one!!
Anyhow, I went there because I had heard that these guys do a lot of business for Rogue engineering and that they are very meticulous: I can confirm!!
The owner, Scott Crispano, took care of the problem and did not even want to charge me anything. I left them a tip anyway but I would highly recommend this place.