The Pyramid repeaters that THP are using, on their low band Kenwood radios, do not transmit a pl tone. They have a receive pl tone programmed into them but no transmit pl. This allows the Pyramids to hear and interact with each other when several are on a scene.
Not sure how the Pyramid mobile extender, you heard is transmitting a pl, but it is possibly not programmed correctly. All other mobile repeaters do not have a pl.