So there's a medium chance that they are fakes, probably something else that's dirt cheap in the same TO-92 package, remarked.
Using a meter with a diode check range, with the remaining pin not connected, a PUJT should read as a diode between anode and gate, anode positive, and open circuit between gate and cathode in either direction. It should read open between cathode and anode, with cathode positive. As we discussed earlier, it should either read open or under 1V between anode and cathode, anode positive, depending on whether or not its triggered.
If two unused ones fail those tests, you've got fakes. Two pins conducting and a diode junction to a third pin suggests they may actually be JFETs.