I guess that must mean that the rest of us are liars
I haven't tested talking through a repeater on a handheld while listening on my mobile, but all of my H/Ts, from $18 Fegs to $100 Wouxuns do it. If they're listening on 462, and another HT is transmitting on 467 in the same room, I won't hear the transmission from the radio through the repeater on any of the other radios. I'll only get the kickback after I stop transmitting