i have some q's about the pygmy leaf chams i got the other day.......
who did you get them from? Have you contacted them?
i got two, and i had them in a 10 gallon with plants etc...but when i misted them, one of them did the strangest thing....he started twisting and moving side to side, he had its eyes closed, and every couple min. gasped for breath...it was so loud that i could her it trough the glass.
Are you spraying directly on them or onto the plants so they can drink from it? I don't know if it is possible but maybe it did the equivalent of "drowning" as if he was trying to shake the water from his nose and/or mouth. They are sooo tiny I doubt it would take much
But I would certainly contact the breeder. How big are they? What are you feeding them (what size crix)?
Later, i found him dead . the smaller one is fine and i have seen it drink consintenly.i havent seen them eat exept for one time, but i know they are eating because the crix are gone and they are alive.
But how in the name of god do you sex them? (or it)
I had the breeder sex them before I got them and he was 95% sure that my one guy is a guy. It would be the same as any other by the hemipenal bump but obviously it's pretty tough when they are so small.
Well, that's my two cents and hopefully Bill or Carlton (or someone) who has more experience will chime in and can give you more specific advice on what may have happened.
I am sorry that it happened at all 
lele